diff --git a/PKHeX.Core/Legality/Evolutions/EvolutionChain.cs b/PKHeX.Core/Legality/Evolutions/EvolutionChain.cs
index 994669e79..c332862bd 100644
--- a/PKHeX.Core/Legality/Evolutions/EvolutionChain.cs
+++ b/PKHeX.Core/Legality/Evolutions/EvolutionChain.cs
@@ -29,7 +29,7 @@ private static List<EvoCriteria>[] GetChainBase(int maxgen)
 
         private static List<EvoCriteria>[] GetChainSingle(PKM pkm, List<EvoCriteria> CompleteEvoChain)
         {
-            var chain = GetChainBase(pkm.Format);
+            var chain = GetChainBase(Math.Max(2, pkm.Format));
             chain[pkm.Format] = CompleteEvoChain;
             return chain;
         }