Initial Gen1 legality checks (WIP)

Have only tested pk1 format so far; there's still a few cases that are
unhandled (move discrepancies between games, trade gifts, event mew,
tmhm).

pls no report bugs unless you are very detailed (include WHY it is
wrong).

PKHeX.WinForms/MainWindow/Main.cs

@@ -2837,7 +2837,9 @@ namespace PKHeX.WinForms
             LegalityAnalysis la = new LegalityAnalysis(pk);
             if (!la.Parsed)
             {
-                WinFormsUtil.Alert($"Checking legality of PK{pk.Format} files that originated from Gen{pk.GenNumber} is not supported.");
+                WinFormsUtil.Alert(pk.Format < 3
+                    ? $"Checking legality of PK{pk.Format} files is not supported."
+                    : $"Checking legality of PK{pk.Format} files that originated from Gen{pk.GenNumber} is not supported.");
                 return;
             }
             if (tabs)
@@ -2846,48 +2848,43 @@ namespace PKHeX.WinForms
         }
         private void updateLegality(LegalityAnalysis la = null, bool skipMoveRepop = false)
         {
-            if (pkm.GenNumber >= 6)
+            if (!fieldsLoaded)
+                return;
+            
+            Legality = la ?? new LegalityAnalysis(pkm);
+            if (!Legality.Parsed || HaX)
             {
-                if (!fieldsLoaded)
-                    return;
-                Legality = la ?? new LegalityAnalysis(pkm);
-                if (!Legality.Parsed || HaX)
-                {
-                    PB_Legal.Visible = false;
-                    return;
-                }
-                PB_Legal.Visible = true;
-
-                PB_Legal.Image = Legality.Valid ? Resources.valid : Resources.warn;
-
-                // Refresh Move Legality
-                for (int i = 0; i < 4; i++)
-                    movePB[i].Visible = !Legality.vMoves[i].Valid && !HaX;
-
-                for (int i = 0; i < 4; i++)
-                    relearnPB[i].Visible = !Legality.vRelearn[i].Valid && !HaX;
-
-                if (skipMoveRepop)
-                    return;
-                // Resort moves
-                bool tmp = fieldsLoaded;
-                fieldsLoaded = false;
-                var cb = new[] { CB_Move1, CB_Move2, CB_Move3, CB_Move4 };
-                var moves = Legality.AllSuggestedMovesAndRelearn;
-                var moveList = GameInfo.MoveDataSource.OrderByDescending(m => moves.Contains(m.Value)).ToList();
-                foreach (ComboBox c in cb)
-                {
-                    var index = WinFormsUtil.getIndex(c);
-                    c.DataSource = new BindingSource(moveList, null);
-                    c.SelectedValue = index;
-                }
-                fieldsLoaded |= tmp;
-            }
-            else
-            {
-                PB_Legal.Visible = PB_WarnMove1.Visible = PB_WarnMove2.Visible = PB_WarnMove3.Visible = PB_WarnMove4.Visible =
+                PB_Legal.Visible =
+                PB_WarnMove1.Visible = PB_WarnMove2.Visible = PB_WarnMove3.Visible = PB_WarnMove4.Visible =
                 PB_WarnRelearn1.Visible = PB_WarnRelearn2.Visible = PB_WarnRelearn3.Visible = PB_WarnRelearn4.Visible = false;
+                return;
             }
+
+            PB_Legal.Visible = true;
+            PB_Legal.Image = Legality.Valid ? Resources.valid : Resources.warn;
+
+            // Refresh Move Legality
+            for (int i = 0; i < 4; i++)
+                movePB[i].Visible = !Legality.vMoves[i].Valid && !HaX;
+            
+            for (int i = 0; i < 4; i++)
+                relearnPB[i].Visible = !Legality.vRelearn[i].Valid && !HaX && pkm.Format >= 6;
+
+            if (skipMoveRepop)
+                return;
+            // Resort moves
+            bool tmp = fieldsLoaded;
+            fieldsLoaded = false;
+            var cb = new[] {CB_Move1, CB_Move2, CB_Move3, CB_Move4};
+            var moves = Legality.AllSuggestedMovesAndRelearn;
+            var moveList = GameInfo.MoveDataSource.OrderByDescending(m => moves.Contains(m.Value)).ToList();
+            foreach (ComboBox c in cb)
+            {
+                var index = WinFormsUtil.getIndex(c);
+                c.DataSource = new BindingSource(moveList, null);
+                c.SelectedValue = index;
+            }
+            fieldsLoaded |= tmp;
         }
 
         private void updateGender()

PKHeX/Legality/Analysis.cs

@@ -39,11 +39,14 @@ namespace PKHeX.Core
 
             try
             {
+                switch (pk.Format) // prior to storing GameVersion
+                {
+                    case 1: parsePK1(pk); break;
+                }
                 switch (pk.GenNumber)
                 {
                     case 6: parsePK6(pk); break;
                     case 7: parsePK7(pk); break;
-                    default: return;
                 }
 
                 Valid = Parsed = Parse.Any();
@@ -59,6 +62,8 @@ namespace PKHeX.Core
                     if (pkm.FatefulEncounter && vRelearn.Any(chk => !chk.Valid) && EncounterMatch == null)
                         AddLine(Severity.Indeterminate, "Fateful Encounter with no matching Encounter. Has the Mystery Gift data been contributed?", CheckIdentifier.Fateful);
                 }
+                else
+                    return;
             }
             catch { Valid = false; }
             AllSuggestedMoves = !pkm.IsOriginValid() ? new int[4] : getSuggestedMoves(true, true, true);
@@ -74,6 +79,19 @@ namespace PKHeX.Core
         {
             Parse.Add(chk);
         }
+
+        private void parsePK1(PKM pk)
+        {
+            pkm = pk;
+            if (!pkm.IsOriginValid())
+            { AddLine(Severity.Invalid, "Species does not exist in origin game.", CheckIdentifier.None); return; }
+            
+            updateEncounterChain();
+            updateMoveLegality();
+            verifyNickname();
+            verifyDVs();
+            verifyG1OT();
+        }
         private void parsePK6(PKM pk)
         {
             pkm = pk;
@@ -116,6 +134,7 @@ namespace PKHeX.Core
                 EncounterMatch = EventGiftMatch.First(); // temporarily set one so that Encounter can be verified
 
             Encounter = verifyEncounter();
+            Parse.Add(Encounter);
             EvoChain = Legal.getEvolutionChain(pkm, EncounterMatch);
         }
         private void updateChecks()
@@ -160,6 +179,8 @@ namespace PKHeX.Core
             for (int i = 0; i < 4; i++)
                 if (!vMoves[i].Valid)
                     r += $"{vMoves[i].Judgement} Move {i + 1}: {vMoves[i].Comment}" + Environment.NewLine;
+
+            if (pkm.Format >= 6)
             for (int i = 0; i < 4; i++)
                 if (!vRelearn[i].Valid)
                     r += $"{vRelearn[i].Judgement} Relearn Move {i + 1}: {vRelearn[i].Comment}" + Environment.NewLine;
@@ -186,7 +207,9 @@ namespace PKHeX.Core
             for (int i = 0; i < 4; i++)
                 if (vMoves[i].Valid)
                     r += $"{vMoves[i].Judgement} Move {i + 1}: {vMoves[i].Comment}" + Environment.NewLine;
-            for (int i = 0; i < 4; i++)
+
+            if (pkm.Format >= 6)
+                for (int i = 0; i < 4; i++)
                 if (vRelearn[i].Valid)
                     r += $"{vRelearn[i].Judgement} Relearn Move {i + 1}: {vRelearn[i].Comment}" + Environment.NewLine;
 
@@ -222,8 +245,10 @@ namespace PKHeX.Core
         }
         public int[] getSuggestedMoves(bool tm, bool tutor, bool reminder)
         {
-            if (pkm == null || pkm.GenNumber < 6 || !pkm.IsOriginValid())
+            if (pkm == null || !pkm.IsOriginValid())
                 return null;
+            if (pkm.GenNumber < 6 && pkm.Format != 1)
+                return new int[4];
             return Legal.getValidMoves(pkm, EvoChain, Tutor: tutor, Machine: tm, MoveReminder: reminder).Skip(1).ToArray(); // skip move 0
         }
 

PKHeX/Legality/Checks.cs

@@ -250,10 +250,13 @@ namespace PKHeX.Core
                     return;
                 }
                 AddLine(Severity.Valid, "Nickname does not match another species name.", CheckIdentifier.EVs);
-                return;
             }
-
-            // else
+            else if (pkm.Format < 3)
+            {
+                // pk1/pk2 IsNicknamed getter checks for match, logic should only reach here if matches.
+                AddLine(Severity.Valid, "Nickname matches species name.", CheckIdentifier.EVs);
+            }
+            else
             {
                 // Can't have another language name if it hasn't evolved or wasn't a language-traded egg.
                 bool match = (pkm.WasTradedEgg || Legal.getHasEvolved(pkm)) && PKX.SpeciesLang.Any(lang => lang[pkm.Species] == nickname)
@@ -263,8 +266,6 @@ namespace PKHeX.Core
                     AddLine(Severity.Invalid, "Nickname does not match species name.", CheckIdentifier.EVs);
                 else
                     AddLine(Severity.Valid, "Nickname matches species name.", CheckIdentifier.EVs);
-
-                // return;
             }
         }
         private void verifyEVs()
@@ -328,6 +329,10 @@ namespace PKHeX.Core
             else if (pkm.IVs[0] < 30 && pkm.IVs.All(iv => pkm.IVs[0] == iv))
                 AddLine(Severity.Fishy, "All IVs are equal.", CheckIdentifier.IVs);
         }
+        private void verifyDVs()
+        {
+            // todo
+        }
         private void verifyOT()
         {
             if (EncounterType == typeof(EncounterTrade))
@@ -348,19 +353,21 @@ namespace PKHeX.Core
                 AddLine(Severity.Fishy, "SID is zero.", CheckIdentifier.Trainer);
 
             if (pkm.VC)
-            {
-                string tr = pkm.OT_Name;
-                string pk = pkm.Nickname;
-                var langset = PKX.SpeciesLang.FirstOrDefault(s => s.Contains(pk)) ?? PKX.SpeciesLang[2];
-                int lang = Array.IndexOf(PKX.SpeciesLang, langset);
+                verifyG1OT();
+        }
+        private void verifyG1OT()
+        {
+            string tr = pkm.OT_Name;
+            string pk = pkm.Nickname;
+            var langset = PKX.SpeciesLang.FirstOrDefault(s => s.Contains(pk)) ?? PKX.SpeciesLang[2];
+            int lang = Array.IndexOf(PKX.SpeciesLang, langset);
 
-                if (tr.Length > (lang == 2 ? 7 : 5))
-                    AddLine(Severity.Invalid, "OT Name too long.", CheckIdentifier.Trainer);
-                if (pkm.Species == 151)
-                {
-                    if (tr != "GF" && tr != "ゲーフリ") // if there are more events with special OTs, may be worth refactoring
-                        AddLine(Severity.Invalid, "Incorrect event OT Name.", CheckIdentifier.Trainer);
-                }
+            if (tr.Length > (lang == 2 ? 7 : 5))
+                AddLine(Severity.Invalid, "OT Name too long.", CheckIdentifier.Trainer);
+            if (pkm.Species == 151)
+            {
+                if (tr != "GF" && tr != "ゲーフリ") // if there are more events with special OTs, may be worth refactoring
+                    AddLine(Severity.Invalid, "Incorrect event OT Name.", CheckIdentifier.Trainer);
             }
         }
 
@@ -386,151 +393,183 @@ namespace PKHeX.Core
                 }
             }
         }
+
+        private CheckResult verifyEncounterLink()
+        {
+            // Should NOT be Fateful, and should be in Database
+            EncounterLink enc = EncounterMatch as EncounterLink;
+            if (enc == null)
+                return new CheckResult(Severity.Invalid, "Invalid Link Gift: unable to find matching gift.", CheckIdentifier.Encounter);
+
+            if (pkm.XY && !enc.XY)
+                return new CheckResult(Severity.Invalid, "Invalid Link Gift: can't obtain in XY.", CheckIdentifier.Encounter);
+            if (pkm.AO && !enc.ORAS)
+                return new CheckResult(Severity.Invalid, "Invalid Link Gift: can't obtain in ORAS.", CheckIdentifier.Encounter);
+            if (pkm.SM && !enc.SM)
+                return new CheckResult(Severity.Invalid, "Invalid Link Gift: can't obtain in SM.", CheckIdentifier.Encounter);
+
+            if (enc.Shiny != null && (bool)enc.Shiny ^ pkm.IsShiny)
+                return new CheckResult(Severity.Invalid, "Shiny Link gift mismatch.", CheckIdentifier.Encounter);
+
+            return pkm.FatefulEncounter
+                ? new CheckResult(Severity.Invalid, "Invalid Link Gift: should not be Fateful Encounter.", CheckIdentifier.Encounter)
+                : new CheckResult(Severity.Valid, "Valid Link gift.", CheckIdentifier.Encounter);
+        }
+
+        private CheckResult verifyEncounterEvent()
+        {
+            MysteryGift MatchedGift = EncounterMatch as MysteryGift;
+            if (MatchedGift != null)
+                return new CheckResult(Severity.Valid, $"Matches #{MatchedGift.CardID:0000} ({MatchedGift.CardTitle})", CheckIdentifier.Encounter);
+            return null;
+        }
+        private CheckResult verifyEncounterEgg()
+        {
+            // Check Hatch Locations
+            if (pkm.Met_Level != 1)
+                return new CheckResult(Severity.Invalid, "Invalid met level, expected 1.", CheckIdentifier.Encounter);
+            // Check species
+            if (Legal.NoHatchFromEgg.Contains(pkm.Species))
+                return new CheckResult(Severity.Invalid, "Species cannot be hatched from an egg.", CheckIdentifier.Encounter);
+            if (pkm.IsEgg)
+            {
+                if (pkm.Egg_Location == 30002)
+                    return new CheckResult(Severity.Invalid, "Egg location shouldn't be 'traded' for an un-hatched egg.", CheckIdentifier.Encounter);
+
+                if (pkm.Met_Location == 30002)
+                    return new CheckResult(Severity.Valid, "Valid traded un-hatched egg.", CheckIdentifier.Encounter);
+                return pkm.Met_Location == 0
+                    ? new CheckResult(Severity.Valid, "Valid un-hatched egg.", CheckIdentifier.Encounter)
+                    : new CheckResult(Severity.Invalid, "Invalid location for un-hatched egg (expected no met location).", CheckIdentifier.Encounter);
+            }
+            if (pkm.XY)
+            {
+                if (pkm.Egg_Location == 318)
+                    return new CheckResult(Severity.Invalid, "Invalid X/Y egg location.", CheckIdentifier.Encounter);
+                return Legal.ValidMet_XY.Contains(pkm.Met_Location)
+                    ? new CheckResult(Severity.Valid, "Valid X/Y hatched egg.", CheckIdentifier.Encounter)
+                    : new CheckResult(Severity.Invalid, "Invalid X/Y location for hatched egg.", CheckIdentifier.Encounter);
+            }
+            if (pkm.AO)
+            {
+                return Legal.ValidMet_AO.Contains(pkm.Met_Location)
+                    ? new CheckResult(Severity.Valid, "Valid OR/AS hatched egg.", CheckIdentifier.Encounter)
+                    : new CheckResult(Severity.Invalid, "Invalid OR/AS location for hatched egg.", CheckIdentifier.Encounter);
+            }
+            if (pkm.SM)
+            {
+                return Legal.ValidMet_SM.Contains(pkm.Met_Location)
+                    ? new CheckResult(Severity.Valid, "Valid S/M hatched egg.", CheckIdentifier.Encounter)
+                    : new CheckResult(Severity.Invalid, "Invalid S/M location for hatched egg.", CheckIdentifier.Encounter);
+            }
+            return new CheckResult(Severity.Invalid, "Invalid location for hatched egg.", CheckIdentifier.Encounter);
+        }
+        private CheckResult verifyEncounterSafari()
+        {
+            if (pkm.Species == 670 || pkm.Species == 671) // Floette
+                if (!new[] {0, 1, 3}.Contains(pkm.AltForm)) // 0/1/3 - RBY
+                    return new CheckResult(Severity.Invalid, "Friend Safari: Not valid color.", CheckIdentifier.Encounter);
+            else if (pkm.Species == 710 || pkm.Species == 711) // Pumpkaboo
+                if (pkm.AltForm != 1) // Average
+                    return new CheckResult(Severity.Invalid, "Friend Safari: Not average sized.", CheckIdentifier.Encounter);
+            else if (pkm.Species == 586) // Sawsbuck
+                if (pkm.AltForm != 0)
+                    return new CheckResult(Severity.Invalid, "Friend Safari: Not Spring form.", CheckIdentifier.Encounter);
+
+            return new CheckResult(Severity.Valid, "Valid Friend Safari encounter.", CheckIdentifier.Encounter);
+        }
+
+        private CheckResult verifyEncounterWild()
+        {
+            EncounterSlot[] enc = (EncounterSlot[])EncounterMatch;
+
+            if (enc.Any(slot => slot.Normal))
+                return enc.All(slot => slot.Pressure)
+                    ? new CheckResult(Severity.Valid, "Valid encounter at location (Pressure/Hustle/Vital Spirit).", CheckIdentifier.Encounter)
+                    : new CheckResult(Severity.Valid, "Valid encounter at location.", CheckIdentifier.Encounter);
+
+            // Decreased Level Encounters
+            if (enc.Any(slot => slot.WhiteFlute))
+                return enc.All(slot => slot.Pressure)
+                    ? new CheckResult(Severity.Valid, "Valid encounter at location (White Flute & Pressure/Hustle/Vital Spirit).", CheckIdentifier.Encounter)
+                    : new CheckResult(Severity.Valid, "Valid encounter at location (White Flute).", CheckIdentifier.Encounter);
+
+            // Increased Level Encounters
+            if (enc.Any(slot => slot.BlackFlute))
+                return enc.All(slot => slot.Pressure)
+                    ? new CheckResult(Severity.Valid, "Valid encounter at location (Black Flute & Pressure/Hustle/Vital Spirit).", CheckIdentifier.Encounter)
+                    : new CheckResult(Severity.Valid, "Valid encounter at location (Black Flute).", CheckIdentifier.Encounter);
+
+            if (enc.Any(slot => slot.Pressure))
+                return new CheckResult(Severity.Valid, "Valid encounter at location (Pressure/Hustle/Vital Spirit).", CheckIdentifier.Encounter);
+
+            return new CheckResult(Severity.Valid, "Valid encounter at location (DexNav).", CheckIdentifier.Encounter);
+        }
+        private CheckResult verifyEncounterStatic()
+        {
+            // Re-parse relearn moves
+            var s = (EncounterStatic)EncounterMatch;
+            if (s.EggLocation != 60002 || vRelearn.Any(rl => !rl.Valid))
+            {
+                for (int i = 0; i < 4; i++)
+                    vRelearn[i] = pkm.RelearnMoves[i] != s.Relearn[i]
+                        ? new CheckResult(Severity.Invalid, "Static encounter relearn move mismatch.", CheckIdentifier.RelearnMove)
+                        : new CheckResult(CheckIdentifier.RelearnMove);
+                return new CheckResult(Severity.Valid, "Valid gift/static encounter.", CheckIdentifier.Encounter);
+            }
+            return null;
+        }
         private CheckResult verifyEncounter()
         {
-            if (pkm.GenNumber < 6)
-                return new CheckResult(Severity.NotImplemented, "Not Implemented.", CheckIdentifier.Encounter);
-
-            if (pkm.VC)
+            if (pkm.VC || pkm.Format < 3)
             {
                 int baseSpecies = Legal.getBaseSpecies(pkm);
-                if ((pkm.VC1 && baseSpecies > Legal.MaxSpeciesID_1) || 
-                    (pkm.VC2 && baseSpecies > Legal.MaxSpeciesID_2))
+                bool g1 = pkm.VC1 || pkm.Format == 1;
+                
+                if ((g1 && baseSpecies > Legal.MaxSpeciesID_1) || (baseSpecies > Legal.MaxSpeciesID_2))
                     return new CheckResult(Severity.Invalid, "VC: Unobtainable species.", CheckIdentifier.Encounter);
-
-                return verifyVCEncounter(baseSpecies);
+                
+                if (pkm.Format > 2) // transported to 7+
+                    Parse.Add(verifyVCEncounter(baseSpecies));
             }
-
-            if (pkm.WasLink)
+            else if (pkm.GenNumber == 4)
             {
-                // Should NOT be Fateful, and should be in Database
-                EncounterLink enc = EncounterMatch as EncounterLink;
-                if (enc == null)
-                    return new CheckResult(Severity.Invalid, "Invalid Link Gift: unable to find matching gift.", CheckIdentifier.Encounter);
-                
-                if (pkm.XY && !enc.XY)
-                    return new CheckResult(Severity.Invalid, "Invalid Link Gift: can't obtain in XY.", CheckIdentifier.Encounter);
-                if (pkm.AO && !enc.ORAS)
-                    return new CheckResult(Severity.Invalid, "Invalid Link Gift: can't obtain in ORAS.", CheckIdentifier.Encounter);
-                if (pkm.SM && !enc.SM)
-                    return new CheckResult(Severity.Invalid, "Invalid Link Gift: can't obtain in SM.", CheckIdentifier.Encounter);
-                
-                if (enc.Shiny != null && (bool)enc.Shiny ^ pkm.IsShiny)
-                    return new CheckResult(Severity.Invalid, "Shiny Link gift mismatch.", CheckIdentifier.Encounter);
 
-                return pkm.FatefulEncounter 
-                    ? new CheckResult(Severity.Invalid, "Invalid Link Gift: should not be Fateful Encounter.", CheckIdentifier.Encounter) 
-                    : new CheckResult(Severity.Valid, "Valid Link gift.", CheckIdentifier.Encounter);
+            }
+            else
+            {
+                if (pkm.WasLink)
+                    return verifyEncounterLink();
             }
 
             if (pkm.WasEvent || pkm.WasEventEgg)
             {
-                MysteryGift MatchedGift = EncounterMatch as MysteryGift;
-                if (MatchedGift != null)
-                    return new CheckResult(Severity.Valid, $"Matches #{MatchedGift.CardID:0000} ({MatchedGift.CardTitle})", CheckIdentifier.Encounter);
+                var result = verifyEncounterEvent();
+                if (result != null)
+                    return result;
             }
 
             EncounterMatch = Legal.getValidStaticEncounter(pkm);
             if (EncounterMatch != null)
             {
-                // Re-parse relearn moves
-                var s = (EncounterStatic)EncounterMatch;
-                if (s.EggLocation != 60002 || vRelearn.Any(rl => !rl.Valid))
-                {
-                    for (int i = 0; i < 4; i++)
-                        vRelearn[i] = pkm.RelearnMoves[i] != s.Relearn[i]
-                            ? new CheckResult(Severity.Invalid, "Static encounter relearn move mismatch.", CheckIdentifier.RelearnMove)
-                            : new CheckResult(CheckIdentifier.RelearnMove);
-                    return new CheckResult(Severity.Valid, "Valid gift/static encounter.", CheckIdentifier.Encounter);
-                }
+                var result = verifyEncounterStatic();
+                if (result != null)
+                    return result;
             }
 
-            EncounterMatch = null; // Reset object
+            // Reset Encounter Object, test for remaining encounters
+            EncounterMatch = null;
             if (pkm.WasEgg)
-            {
-                // Check Hatch Locations
-                if (pkm.Met_Level != 1)
-                    return new CheckResult(Severity.Invalid, "Invalid met level, expected 1.", CheckIdentifier.Encounter);
-                // Check species
-                if (Legal.NoHatchFromEgg.Contains(pkm.Species))
-                    return new CheckResult(Severity.Invalid, "Species cannot be hatched from an egg.", CheckIdentifier.Encounter);
-                if (pkm.IsEgg)
-                {
-                    if (pkm.Egg_Location == 30002)
-                        return new CheckResult(Severity.Invalid, "Egg location shouldn't be 'traded' for an un-hatched egg.", CheckIdentifier.Encounter);
-
-                    if (pkm.Met_Location == 30002)
-                        return new CheckResult(Severity.Valid, "Valid traded un-hatched egg.", CheckIdentifier.Encounter);
-                    return pkm.Met_Location == 0
-                        ? new CheckResult(Severity.Valid, "Valid un-hatched egg.", CheckIdentifier.Encounter)
-                        : new CheckResult(Severity.Invalid, "Invalid location for un-hatched egg (expected no met location).", CheckIdentifier.Encounter);
-                }
-                if (pkm.XY)
-                {
-                    if (pkm.Egg_Location == 318)
-                        return new CheckResult(Severity.Invalid, "Invalid X/Y egg location.", CheckIdentifier.Encounter);
-                    return Legal.ValidMet_XY.Contains(pkm.Met_Location)
-                        ? new CheckResult(Severity.Valid, "Valid X/Y hatched egg.", CheckIdentifier.Encounter)
-                        : new CheckResult(Severity.Invalid, "Invalid X/Y location for hatched egg.", CheckIdentifier.Encounter);
-                }
-                if (pkm.AO)
-                {
-                    return Legal.ValidMet_AO.Contains(pkm.Met_Location)
-                        ? new CheckResult(Severity.Valid, "Valid OR/AS hatched egg.", CheckIdentifier.Encounter)
-                        : new CheckResult(Severity.Invalid, "Invalid OR/AS location for hatched egg.", CheckIdentifier.Encounter);
-                }
-                if (pkm.SM)
-                {
-                    return Legal.ValidMet_SM.Contains(pkm.Met_Location)
-                        ? new CheckResult(Severity.Valid, "Valid S/M hatched egg.", CheckIdentifier.Encounter)
-                        : new CheckResult(Severity.Invalid, "Invalid S/M location for hatched egg.", CheckIdentifier.Encounter);
-                }
-                return new CheckResult(Severity.Invalid, "Invalid location for hatched egg.", CheckIdentifier.Encounter);
-            }
+                return verifyEncounterEgg();
 
             EncounterMatch = Legal.getValidFriendSafari(pkm);
             if (EncounterMatch != null)
-            {
-                if (pkm.Species == 670 || pkm.Species == 671) // Floette
-                    if (!new[] {0, 1, 3}.Contains(pkm.AltForm)) // 0/1/3 - RBY
-                        return new CheckResult(Severity.Invalid, "Friend Safari: Not valid color.", CheckIdentifier.Encounter);
-                else if (pkm.Species == 710 || pkm.Species == 711) // Pumpkaboo
-                    if (pkm.AltForm != 1) // Average
-                        return new CheckResult(Severity.Invalid, "Friend Safari: Not average sized.", CheckIdentifier.Encounter);
-                else if (pkm.Species == 586) // Sawsbuck
-                    if (pkm.AltForm != 0)
-                        return new CheckResult(Severity.Invalid, "Friend Safari: Not Spring form.", CheckIdentifier.Encounter);
-
-                return new CheckResult(Severity.Valid, "Valid Friend Safari encounter.", CheckIdentifier.Encounter);
-            }
+                return verifyEncounterSafari();
 
             EncounterMatch = Legal.getValidWildEncounters(pkm);
             if (EncounterMatch != null)
-            {
-                EncounterSlot[] enc = (EncounterSlot[])EncounterMatch;
+                return verifyEncounterWild();
 
-                if (enc.Any(slot => slot.Normal))
-                    return enc.All(slot => slot.Pressure) 
-                        ? new CheckResult(Severity.Valid, "Valid encounter at location (Pressure/Hustle/Vital Spirit).", CheckIdentifier.Encounter) 
-                        : new CheckResult(Severity.Valid, "Valid encounter at location.", CheckIdentifier.Encounter);
-
-                // Decreased Level Encounters
-                if (enc.Any(slot => slot.WhiteFlute))
-                    return enc.All(slot => slot.Pressure)
-                        ? new CheckResult(Severity.Valid, "Valid encounter at location (White Flute & Pressure/Hustle/Vital Spirit).", CheckIdentifier.Encounter)
-                        : new CheckResult(Severity.Valid, "Valid encounter at location (White Flute).", CheckIdentifier.Encounter);
-
-                // Increased Level Encounters
-                if (enc.Any(slot => slot.BlackFlute))
-                    return enc.All(slot => slot.Pressure)
-                        ? new CheckResult(Severity.Valid, "Valid encounter at location (Black Flute & Pressure/Hustle/Vital Spirit).", CheckIdentifier.Encounter)
-                        : new CheckResult(Severity.Valid, "Valid encounter at location (Black Flute).", CheckIdentifier.Encounter);
-
-                if (enc.Any(slot => slot.Pressure))
-                    return new CheckResult(Severity.Valid, "Valid encounter at location (Pressure/Hustle/Vital Spirit).", CheckIdentifier.Encounter);
-
-                return new CheckResult(Severity.Valid, "Valid encounter at location (DexNav).", CheckIdentifier.Encounter);
-            }
             EncounterMatch = Legal.getValidIngameTrade(pkm);
             if (EncounterMatch != null)
                 return new CheckResult(Severity.Valid, "Valid ingame trade.", CheckIdentifier.Encounter);
@@ -1777,9 +1816,7 @@ namespace PKHeX.Core
             CheckResult[] res = new CheckResult[4];
             for (int i = 0; i < 4; i++)
                 res[i] = new CheckResult(CheckIdentifier.Move);
-            if (pkm.GenNumber < 6 || pkm.VC1)
-                return res;
-
+            
             var validMoves = Legal.getValidMoves(pkm, EvoChain).ToArray();
             if (pkm.Species == 235) // Smeargle
             {

PKHeX/Legality/Core.cs

@@ -12,6 +12,7 @@ namespace PKHeX.Core
 
         // Gen 1
         private static readonly Learnset[] LevelUpRB = Learnset1.getArray(Resources.lvlmove_rby);
+        private static readonly Learnset[] LevelUpY = Learnset1.getArray(Resources.lvlmove_rby);
         private static readonly EvolutionTree Evolves1;
         private static readonly EncounterArea[] SlotsRBY;
         private static readonly EncounterStatic[] StaticRBY;
@@ -282,12 +283,15 @@ namespace PKHeX.Core
                     continue;
                 if (e.EggLocation != pkm.Egg_Location)
                     continue;
-                if (pkm.HasOriginalMetLocation && e.Location != 0 && e.Location != pkm.Met_Location)
-                    continue;
+                if (pkm.HasOriginalMetLocation)
+                {
+                    if (e.Location != 0 && e.Location != pkm.Met_Location)
+                        continue;
+                    if (e.Level != pkm.Met_Level)
+                        continue;
+                }
                 if (e.Gender != -1 && e.Gender != pkm.Gender)
                     continue;
-                if (e.Level != pkm.Met_Level)
-                    continue;
                 if (e.Form != pkm.AltForm && !FormChange.Contains(pkm.Species) && !e.SkipFormCheck)
                     continue;
 
@@ -783,7 +787,7 @@ namespace PKHeX.Core
             }
             if (t is int)
                 return "Unknown";
-            return t.GetType().Name;
+            return t?.GetType().Name ?? "Unknown";
         }
         private static IEnumerable<EncounterArea> getDexNavAreas(PKM pkm)
         {
@@ -802,7 +806,8 @@ namespace PKHeX.Core
             List<int> moves = new List<int>();
             if (pkm.InhabitedGeneration(1))
             {
-                moves.AddRange(LevelUpRB[species].getMoves(lvl));
+                moves.AddRange(((PersonalInfoG1)PersonalTable.RBY[species]).Moves);
+                moves.AddRange(LevelUpY[species].getMoves(lvl));
             }
             if (pkm.InhabitedGeneration(6))
             {
@@ -822,6 +827,7 @@ namespace PKHeX.Core
         {
             switch ((GameVersion)pkm.Version)
             {
+                case GameVersion.RBY:
                 case GameVersion.RD: case GameVersion.BU:
                 case GameVersion.GN: case GameVersion.YW:
                     return getSlots(pkm, SlotsRBY, lvl);
@@ -846,6 +852,7 @@ namespace PKHeX.Core
         {
             switch ((GameVersion)pkm.Version)
             {
+                case GameVersion.RBY:
                 case GameVersion.RD: case GameVersion.BU:
                 case GameVersion.GN: case GameVersion.YW:
                     return getStatic(pkm, StaticRBY, lvl);
@@ -884,18 +891,31 @@ namespace PKHeX.Core
 
             // Get Valid levels
             IEnumerable<DexLevel> vs = getValidPreEvolutions(pkm);
+
             // Get slots where pokemon can exist
-            IEnumerable<EncounterSlot> slots = loc.Slots.Where(slot => vs.Any(evo => evo.Species == slot.Species && evo.Level >= slot.LevelMin - df) || ignoreLevel);
+            bool ignoreSlotLevel = ignoreLevel;
+            IEnumerable<EncounterSlot> slots = loc.Slots.Where(slot => vs.Any(evo => evo.Species == slot.Species && (ignoreSlotLevel || evo.Level >= slot.LevelMin - df)));
+
+            if (pkm.Format < 3 || pkm.VC)
+                return slots; // no met level or special encounter considerations
 
             // Filter for Met Level
             int lvl = pkm.Met_Level;
-            var encounterSlots = slots.Where(slot => slot.LevelMin - df <= lvl && lvl <= slot.LevelMax + (slot.AllowDexNav ? dn : df) || ignoreLevel).ToList();
+            int gen = pkm.GenNumber;
+            bool ignoreMetLevel = ignoreLevel || gen <= 4 && pkm.Format != gen;
+            var encounterSlots = slots.Where(slot => ignoreMetLevel || slot.LevelMin - df <= lvl && lvl <= slot.LevelMax + (slot.AllowDexNav ? dn : df)).ToList();
 
             // Pressure Slot
             EncounterSlot slotMax = encounterSlots.OrderByDescending(slot => slot.LevelMax).FirstOrDefault();
             if (slotMax != null)
                 slotMax = new EncounterSlot(slotMax) { Pressure = true, Form = pkm.AltForm };
 
+            if (gen < 4)
+            {
+                if (slotMax != null)
+                    slotdata.Add(slotMax);
+                return slotdata;
+            }
             if (!DexNav)
             {
                 // Filter for Form Specific
@@ -1005,7 +1025,11 @@ namespace PKHeX.Core
         private static IEnumerable<int> getMoves(PKM pkm, int species, int lvl, int form, bool moveTutor, GameVersion Version, bool LVL, bool specialTutors, bool Machine, bool MoveReminder)
         {
             List<int> r = new List<int> { 0 };
-            for (int gen = pkm.GenNumber; gen <= pkm.Format; gen++)
+            int gen = pkm.GenNumber;
+            if (pkm.Format < 3)
+                gen = 1;
+
+            for (; gen <= pkm.Format; gen++)
                r.AddRange(getMoves(pkm, species, lvl, form, moveTutor, Version, LVL, specialTutors, Machine, gen, MoveReminder));
             return r.Distinct();
         }
@@ -1016,6 +1040,17 @@ namespace PKHeX.Core
             var ver = Version;
             switch (Generation)
             {
+                case 1:
+                    {
+                        PersonalInfo pi = PersonalTable.RBY[species];
+                        if (LVL)
+                        {
+                            r.AddRange(((PersonalInfoG1)PersonalTable.RBY[species]).Moves);
+                            r.AddRange(LevelUpRB[species].getMoves(lvl));
+                        }
+                        if (Machine) r.AddRange(TMHM_RBY.Where((t, m) => pi.TMHM[m]));
+                        break;
+                    }
                 case 6:
                     switch (ver)
                     {

PKHeX/Legality/Tables1.cs

@@ -45,7 +45,67 @@ namespace PKHeX.Core
 
         internal static readonly EncounterStatic[] Encounter_RBY =
         {
-            // todo
+            new EncounterStatic { Species = 001, Level = 05 }, // Bulbasaur
+            new EncounterStatic { Species = 004, Level = 05 }, // Charmander
+            new EncounterStatic { Species = 007, Level = 05 }, // Squirtle
+            new EncounterStatic { Species = 025, Level = 05 }, // Pikachu
+            
+            // Red Game Corner
+            new EncounterStatic { Species = 063, Level = 09 }, // Abra
+            new EncounterStatic { Species = 025, Level = 08 }, // Clefairy
+            new EncounterStatic { Species = 025, Level = 17 }, // Nidorina
+            new EncounterStatic { Species = 147, Level = 18 }, // Dratini
+            new EncounterStatic { Species = 123, Level = 25 }, // Scyther
+            new EncounterStatic { Species = 137, Level = 26 }, // Porygon
+
+            // Blue(EN) / Green(JP) Game Corner
+            new EncounterStatic { Species = 063, Level = 06 }, // Abra
+            new EncounterStatic { Species = 035, Level = 12 }, // Clefairy
+            new EncounterStatic { Species = 030, Level = 17 }, // Nidorina
+            new EncounterStatic { Species = 127, Level = 20 }, // Pinsir
+            new EncounterStatic { Species = 147, Level = 24 }, // Dratini
+            new EncounterStatic { Species = 137, Level = 18 }, // Porygon
+
+            // Blue(JP) Game Corner
+            new EncounterStatic { Species = 063, Level = 08 }, // Abra
+            new EncounterStatic { Species = 025, Level = 12 }, // Pikachu
+            new EncounterStatic { Species = 116, Level = 18 }, // Horsea
+            new EncounterStatic { Species = 036, Level = 24 }, // Clefable
+            new EncounterStatic { Species = 148, Level = 30 }, // Dragonair
+            new EncounterStatic { Species = 137, Level = 22 }, // Porygon
+
+            // Yellow Game Corner
+            new EncounterStatic { Species = 063, Level = 15 }, // Abra
+            new EncounterStatic { Species = 025, Level = 18 }, // Vulpix
+            new EncounterStatic { Species = 025, Level = 22 }, // Wigglytuff
+            new EncounterStatic { Species = 123, Level = 30 }, // Scyther
+            new EncounterStatic { Species = 127, Level = 30 }, // Pinsir
+            new EncounterStatic { Species = 137, Level = 26 }, // Porygon
+
+            new EncounterStatic { Species = 129, Level = 05 }, // Magikarp
+            new EncounterStatic { Species = 143, Level = 30 }, // Snorlax
+            new EncounterStatic { Species = 106, Level = 30 }, // Hitmonlee
+            new EncounterStatic { Species = 107, Level = 30 }, // Hitmonchan
+
+            new EncounterStatic { Species = 131, Level = 15 }, // Lapras
+            new EncounterStatic { Species = 138, Level = 30 }, // Omanyte
+            new EncounterStatic { Species = 140, Level = 30 }, // Kabuto
+            new EncounterStatic { Species = 142, Level = 30 }, // Aerodactyl
+
+            
+            new EncounterStatic { Species = 144, Level = 50 }, // Articuno
+            new EncounterStatic { Species = 145, Level = 50 }, // Zapdos
+            new EncounterStatic { Species = 146, Level = 50 }, // Moltres
+
+            new EncounterStatic { Species = 150, Level = 70 }, // Mewtwo
+            
+            new EncounterStatic { Species = 133, Level = 25 }, // Eevee
+
+            // Yellow Only
+            new EncounterStatic { Species = 133, Level = 25 }, // Eevee (Celadon City)
+            new EncounterStatic { Species = 001, Level = 10 }, // Bulbasaur (Cerulean City)
+            new EncounterStatic { Species = 004, Level = 10 }, // Charmander (Route 24)
+            new EncounterStatic { Species = 007, Level = 10 }, // Squirtle (Vermillion City)
         };
         internal static readonly EncounterTrade[] TradeGift_RBY =
         {

PKHeX/PKM/PK1.cs

@@ -259,7 +259,7 @@ namespace PKHeX.Core
         public override int OT_Friendship { get { return 0; } set { } }
         public override int OT_Gender { get { return 0; } set { } }
         public override int Ball { get { return 0; } set { } }
-        public override int Version { get { return 0; } set { } }
+        public override int Version { get { return (int)GameVersion.RBY; } set { } }
         public override int SID { get { return 0; } set { } }
         public override int PKRS_Strain { get { return 0; } set { } }
         public override int PKRS_Days { get { return 0; } set { } }

PKHeX/PKM/PK2.cs

@@ -327,7 +327,7 @@ namespace PKHeX.Core
         public override int Egg_Location { get { return 0; } set { } }
         public override int OT_Friendship { get { return 0; } set { } }
         public override int Ball { get { return 0; } set { } }
-        public override int Version { get { return 0; } set { } }
+        public override int Version { get { return (int)GameVersion.GSC; } set { } }
         public override int SID { get { return 0; } set { } }
         public override int CNT_Cool { get { return 0; } set { } }
         public override int CNT_Beauty { get { return 0; } set { } }

PKHeX/PKM/PKM.cs

@@ -275,7 +275,9 @@ namespace PKHeX.Core
         public bool Gen5 => Version >= 20 && Version <= 23;
         public bool Gen4 => Version >= 7 && Version <= 12 && Version != 9;
         public bool Gen3 => Version >= 1 && Version <= 5 || Version == 15;
-        public bool GenU => !(Gen7 || Gen6 || Gen5 || Gen4 || Gen3);
+        public bool Gen2 => Version == (int)GameVersion.GSC;
+        public bool Gen1 => Version == (int)GameVersion.RBY;
+        public bool GenU => !(Gen7 || Gen6 || Gen5 || Gen4 || Gen3 || Gen2 || Gen1);
         public int GenNumber
         {
             get
@@ -286,6 +288,8 @@ namespace PKHeX.Core
                 if (Gen5) return 5;
                 if (Gen4) return 4;
                 if (Gen3) return 3;
+                if (Gen2) return Format; // 2
+                if (Gen1) return Format; // 1
                 return -1;
             } 
         }
@@ -405,14 +409,17 @@ namespace PKHeX.Core
         public virtual bool WasEventEgg => ((Egg_Location > 40000 && Egg_Location < 50000) || (FatefulEncounter && Egg_Location > 0)) && Met_Level == 1;
         public virtual bool WasTradedEgg => Egg_Location == 30002;
         public virtual bool WasIngameTrade => Met_Location == 30001;
-        public virtual bool IsUntraded => string.IsNullOrWhiteSpace(HT_Name) && GenNumber == Format;
+        public virtual bool IsUntraded => Format >= 6 && string.IsNullOrWhiteSpace(HT_Name) && GenNumber == Format;
         public virtual bool IsNative => GenNumber == Format;
         public virtual bool IsOriginValid()
         {
-            switch (GenNumber)
+            switch (Format)
             {
                 case 1: return Species <= Legal.MaxSpeciesID_1;
                 case 2: return Species <= Legal.MaxSpeciesID_2;
+            }
+            switch (GenNumber)
+            {
                 case 3: return Species <= Legal.MaxSpeciesID_3;
                 case 4: return Species <= Legal.MaxSpeciesID_4;
                 case 5: return Species <= Legal.MaxSpeciesID_5;
@@ -482,7 +489,7 @@ namespace PKHeX.Core
         /// Checks if the PKM has its original met location.
         /// </summary>
         /// <returns>Returns false if the Met Location has been overwritten via generational transfer.</returns>
-        public bool HasOriginalMetLocation => !(GenNumber <= 4 && Format > 4 || VC);
+        public bool HasOriginalMetLocation => !(Format < 3 || VC || GenNumber <= 4 && Format != GenNumber);
 
         /// <summary>
         /// Checks if the current <see cref="Gender"/> is valid.

PKHeX/PersonalInfo/PersonalInfoG1.cs

@@ -40,11 +40,11 @@ namespace PKHeX.Core
         }
         public override int CatchRate { get { return Data[0x08]; } set { Data[0x08] = (byte)value; } }
         public override int BaseEXP { get { return Data[0x09]; } set { Data[0x09] = (byte)value; } }
-        public int Move1 { get { return Data[0x0A]; } set { Data[0x0A] = (byte)value; } }
-        public int Move2 { get { return Data[0x0B]; } set { Data[0x0B] = (byte)value; } }
-        public int Move3 { get { return Data[0x0C]; } set { Data[0x0C] = (byte)value; } }
-        public int Move4 { get { return Data[0x0D]; } set { Data[0x0D] = (byte)value; } }
-        public override int EXPGrowth { get { return Data[0x13]; } set { Data[0x13] = (byte)value; } }
+        public int Move1 { get { return Data[0x0F]; } set { Data[0x0F] = (byte)value; } }
+        public int Move2 { get { return Data[0x10]; } set { Data[0x10] = (byte)value; } }
+        public int Move3 { get { return Data[0x12]; } set { Data[0x12] = (byte)value; } }
+        public int Move4 { get { return Data[0x13]; } set { Data[0x13] = (byte)value; } }
+        public override int EXPGrowth { get { return Data[0x14]; } set { Data[0x14] = (byte)value; } }
 
         // EV Yields are just aliases for base stats in Gen I
         public override int EV_HP { get { return HP; } set { } }
@@ -64,5 +64,11 @@ namespace PKHeX.Core
         public override int BaseFriendship { get { return 0; } set { } }
         public override int EscapeRate { get { return 0; } set { } }
         public override int Color { get { return 0; } set { } }
+
+        public int[] Moves
+        {
+            get { return new[] { Move1, Move2, Move3, Move4 }; }
+            set { if (value?.Length != 4) return; Move1 = value[0]; Move2 = value[1]; Move3 = value[2]; Move4 = value[3]; }
+        }
     }
 }