Add toxtricity evo check

refer to sub_71007805B0 for algo

PKHeX.Core/Legality/Evolutions/EvolutionMethod.cs

@@ -58,6 +58,10 @@ public bool Valid(PKM pkm, int lvl, bool skipChecks)
                 case TradeSpecies:
                     return !pkm.IsUntraded || skipChecks;
 
+                case LevelUpNatureAmped when GetAmpLowKeyResult(pkm.Nature) != pkm.AltForm && !skipChecks:
+                case LevelUpNatureLowKey when GetAmpLowKeyResult(pkm.Nature) != pkm.AltForm && !skipChecks:
+                    return false;
+
                 // Special Level Up Cases -- return false if invalid
                 case LevelUpBeauty when !(pkm is IContestStats s) || s.CNT_Beauty < Argument:
                     return skipChecks;
@@ -135,5 +139,12 @@ public EvolutionMethod Copy(int species)
                 Level = Level
             };
         }
+
+        private static int GetAmpLowKeyResult(int n)
+        {
+            if ((uint)(n - 1) > 22)
+                return 0;
+            return (0x5BCA51 >> (n - 1)) & 1;
+        }
     }
 }

PKHeX.Core/Legality/Evolutions/EvolutionType.cs

@@ -47,6 +47,11 @@ public enum EvolutionType : byte
         LevelUpDusk = 40,
         LevelUpWormhole = 41,
         UseItemWormhole = 42,
+        Crit3, // Sirfetch'd
+        HPDownBy49, // Runerigus
+        SpinType, // Alcremie
+        LevelUpNatureAmped, // Toxtricity
+        LevelUpNatureLowKey, // Toxtricity
     }
 
     public static class EvolutionTypeExtensions