Add date restrictions for WC9, pika diff

PKHeX.Core/Legality/Encounters/Data/Live/EncounterServerDate.cs

@@ -28,14 +28,16 @@ public static class EncounterServerDate
         WC8 wc8 => Result(IsValidDateWC8(wc8.CardID, obtained)),
         WA8 wa8 => Result(IsValidDateWA8(wa8.CardID, obtained)),
         WB8 wb8 => Result(IsValidDateWB8(wb8.CardID, obtained)),
-      //WC9 wc9 => Result(IsValidDateWC9(wc9.CardID, obtained)),
+        WC9 wc9 => Result(IsValidDateWC9(wc9, obtained)),
         _ => throw new ArgumentOutOfRangeException(nameof(enc)),
     };
 
     public static bool IsValidDateWC8(int cardID, DateOnly obtained) => WC8Gifts.TryGetValue(cardID, out var time) && IsValidDate(obtained, time);
     public static bool IsValidDateWA8(int cardID, DateOnly obtained) => WA8Gifts.TryGetValue(cardID, out var time) && IsValidDate(obtained, time);
     public static bool IsValidDateWB8(int cardID, DateOnly obtained) => WB8Gifts.TryGetValue(cardID, out var time) && IsValidDate(obtained, time);
-    public static bool IsValidDateWC9(int cardID, DateOnly obtained) => WC9Gifts.TryGetValue(cardID, out var time) && IsValidDate(obtained, time);
+
+    public static bool IsValidDateWC9(WC9 card  , DateOnly obtained) => (WC9Gifts.TryGetValue(card.CardID, out var time)
+                                                                      || WC9GiftsChk.TryGetValue(card.Checksum, out time)) && IsValidDate(obtained, time);
 
     /// <summary>
     /// Minimum date the gift can be received.
@@ -89,9 +91,20 @@ public static class EncounterServerDate
         {9017, (new(2022, 05, 18), Never)}, // Hidden Ability Piplup
     };
 
-    // ReSharper disable once CollectionNeverUpdated.Global
     /// <summary>
     /// Minimum date the gift can be received.
     /// </summary>
-    public static readonly Dictionary<int, (DateOnly Start, DateOnly? End)> WC9Gifts = new(0);
+    public static readonly Dictionary<int, (DateOnly Start, DateOnly? End)> WC9GiftsChk = new()
+    {
+        {0xE5EB, (new(2022, 11, 17), new(2023, 02, 03))}, // Fly Pikachu - rev 1 (male 128)
+        {0x908B, (new(2023, 02, 02), Never)}, // Fly Pikachu - rev 2 (both 0)
+    };
+
+    /// <summary>
+    /// Minimum date the gift can be received.
+    /// </summary>
+    public static readonly Dictionary<int, (DateOnly Start, DateOnly? End)> WC9Gifts = new()
+    {
+        {1501,  (new(2022, 11, 17), Never)}, // Flabébé Pokécenter
+    };
 }

PKHeX.Core/MysteryGifts/WC9.cs

@@ -268,6 +268,8 @@ public sealed class WC9 : DataMysteryGift, ILangNick, INature, ITeraType, IRibbo
     public byte OT_Feeling { get => Data[CardStart + 0x277]; set => Data[CardStart + 0x277] = value; }
     public ushort OT_TextVar { get => ReadUInt16LittleEndian(Data.AsSpan(CardStart + 0x278)); set => WriteUInt16LittleEndian(Data.AsSpan(CardStart + 0x278), value); }
 
+    public ushort Checksum => ReadUInt16LittleEndian(Data.AsSpan(0x2C4));
+
     // Meta Accessible Properties
     public override int[] IVs
     {
@@ -505,7 +507,7 @@ public sealed class WC9 : DataMysteryGift, ILangNick, INature, ITeraType, IRibbo
             }
         }
 
-        pk.MetDate = IsDateRestricted && EncounterServerDate.WC9Gifts.TryGetValue(CardID, out var dt) ? dt.Start : DateOnly.FromDateTime(DateTime.Now);
+        pk.MetDate = IsDateRestricted && EncounterServerDate.WC9GiftsChk.TryGetValue(CardID, out var dt) ? dt.Start : DateOnly.FromDateTime(DateTime.Now);
 
         var nickname_language = GetLanguage(language);
         pk.Language = nickname_language != 0 ? nickname_language : tr.Language;
@@ -525,12 +527,10 @@ public sealed class WC9 : DataMysteryGift, ILangNick, INature, ITeraType, IRibbo
             SetEggMetData(pk);
         pk.CurrentFriendship = pk.IsEgg ? pi.HatchCycles : pi.BaseFriendship;
 
+        pk.HeightScalar = (byte)HeightValue;
+        pk.WeightScalar = (byte)WeightValue;
         if (!IsHOMEGift)
-        {
-            pk.HeightScalar = PokeSizeUtil.GetRandomScalar();
-            pk.WeightScalar = PokeSizeUtil.GetRandomScalar();
             pk.Scale = PokeSizeUtil.GetRandomScalar();
-        }
 
         pk.Obedience_Level = Level;
         pk.ResetPartyStats();
@@ -723,12 +723,13 @@ public sealed class WC9 : DataMysteryGift, ILangNick, INature, ITeraType, IRibbo
         if (Nature != -1 && pk.Nature != Nature) return false;
         if (Gender != 3 && Gender != pk.Gender) return false;
 
-        if (IsHOMEGift && pk is IScaledSize s)
+        if (pk is IScaledSize s)
         {
-            if (s.HeightScalar != 0)
+            if (s.HeightScalar != HeightValue)
                 return false;
-            if (s.WeightScalar != 0)
+            if (s.WeightScalar != WeightValue)
                 return false;
+            // Random scalar
         }
 
         // PID Types 0 and 1 do not use the fixed PID value.
@@ -740,7 +741,7 @@ public sealed class WC9 : DataMysteryGift, ILangNick, INature, ITeraType, IRibbo
         return pk.PID == GetPID(pk, type);
     }
 
-    public bool IsDateRestricted => IsHOMEGift;
+    public bool IsDateRestricted => true;
 
     protected override bool IsMatchDeferred(PKM pk) => Species != pk.Species;
     protected override bool IsMatchPartial(PKM pk)