More generator updates

* B2 has an error in the encounter table for Route 3 Corphish Special
water encounter; GF edited from Basculin-1 to Corphish-1 and forgot to
update the form to 0.
* Ranch Trade egg locations
* Trade gender-PID set correctly
* static roamer glitch does not apply for emerald
* Mirage Island wild Wynaut case now allowed (collision with Gift Wynaut
egg hatched on Mirage Island?)

gen1-3 done; now at 413 (Wormadam) which currently yields an
EncounterEgg AS wormadam, which isn't right...

PKHeX.Core/Legality/Encounters/EncounterStatic.cs

@@ -193,7 +193,7 @@ namespace PKHeX.Core
         {
             switch (Generation)
             {
-                case 3 when Roaming:
+                case 3 when Roaming && Version != GameVersion.E: // Roamer IV glitch was fixed in Emerald
                     return PIDType.Method_1_Roamer;
                 case 4 when Shiny == Shiny.Always: // Lake of Rage Gyarados
                     return PIDType.ChainShiny;

PKHeX.Core/Legality/Encounters/EncounterTrade.cs

@@ -76,13 +76,19 @@ namespace PKHeX.Core
                 pk.Met_Level = level;
                 pk.Met_Location = Location > 0 ? Location : DefaultMetLocation[Generation - 1];
             }
-            pk.MetDate = DateTime.Today;
+            var today = DateTime.Today;
+            pk.MetDate = today;
+            if (EggLocation != 0)
+            {
+                pk.Egg_Location = EggLocation;
+                pk.EggMetDate = today;
+            }
 
             SAV.ApplyToPKM(pk);
             int nature = Nature == Nature.Random ? Util.Rand.Next(25) : (int)Nature;
             pk.Nature = nature;
             pk.Version = (int)version;
-            pk.Gender = Gender < 0 ? pk.PersonalInfo.RandomGender : Gender;
+            pk.Gender = pk.GetSaneGender(Gender < 0 ? pk.PersonalInfo.RandomGender : Gender);
             pk.AltForm = Form;
 
             pk.Language = lang;

PKHeX.Core/Legality/Encounters/Generator/EncounterGenerator.cs

@@ -353,6 +353,7 @@ namespace PKHeX.Core
             int species = pkm.Species;
             var deferNoFrame = new Queue<IEncounterable>();
             var deferFrame = new Queue<IEncounterable>();
+            pkm.WasEgg = false; // clear flag if set from static
             var slots = FrameFinder.GetFrames(info.PIDIV, pkm).ToList();
             foreach (var z in GetValidWildEncounters34(pkm))
             {