diff --git a/PKHeX.Core/Legality/Encounters/Generator/EncounterMovesetGenerator.cs b/PKHeX.Core/Legality/Encounters/Generator/EncounterMovesetGenerator.cs
index 2bd484eec..163e80517 100644
--- a/PKHeX.Core/Legality/Encounters/Generator/EncounterMovesetGenerator.cs
+++ b/PKHeX.Core/Legality/Encounters/Generator/EncounterMovesetGenerator.cs
@@ -267,7 +267,7 @@ private static IEnumerable<EncounterTrade> GetTrades(PKM pk, IReadOnlyCollection
                     continue;
                 }
                 var em = trade.Moves;
-                if (!needs.Except(em).Any())
+                if (em != null && !needs.Except(em).Any())
                     yield return trade;
             }
         }