From d65e3369c997b21ae2e8fb2f8c63abe80a06abfd Mon Sep 17 00:00:00 2001
From: Kurt <kaphotics@gmail.com>
Date: Sat, 16 Nov 2019 11:01:00 -0800
Subject: [PATCH] Add toxtricity evo check

refer to sub_71007805B0 for algo
---
 PKHeX.Core/Legality/Evolutions/EvolutionMethod.cs | 11 +++++++++++
 PKHeX.Core/Legality/Evolutions/EvolutionType.cs   |  5 +++++
 2 files changed, 16 insertions(+)

diff --git a/PKHeX.Core/Legality/Evolutions/EvolutionMethod.cs b/PKHeX.Core/Legality/Evolutions/EvolutionMethod.cs
index dafef0cde..44aee3b60 100644
--- a/PKHeX.Core/Legality/Evolutions/EvolutionMethod.cs
+++ b/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;
+        }
     }
 }
\ No newline at end of file
diff --git a/PKHeX.Core/Legality/Evolutions/EvolutionType.cs b/PKHeX.Core/Legality/Evolutions/EvolutionType.cs
index f57ad67ff..73602dbea 100644
--- a/PKHeX.Core/Legality/Evolutions/EvolutionType.cs
+++ b/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