diff --git a/Legality/Checks.cs b/Legality/Checks.cs
index 08500ec93..4f8cd46e9 100644
--- a/Legality/Checks.cs
+++ b/Legality/Checks.cs
@@ -560,6 +560,8 @@ private LegalityCheck verifyBall()
                 {
                     if (Legal.Ban_Gen3Ball.Contains(pk6.Species))
                         return new LegalityCheck(Severity.Invalid, "Unobtainable capture for Gen4 Ball.");
+                    if (pk6.AbilityNumber == 4 && 152 <= pk6.Species && pk6.Species <= 160)
+                        return new LegalityCheck(Severity.Invalid, "Ball not possible for species with hidden ability.");
 
                     return new LegalityCheck(Severity.Valid, "Obtainable capture for Gen4 Ball.");
                 }
@@ -570,7 +572,7 @@ private LegalityCheck verifyBall()
         private LegalityCheck verifyHistory()
         {
             if (!Encounter.Valid)
-                return new LegalityCheck(Severity.Valid, "Skipped Memory check due to other check being invalid.");
+                return new LegalityCheck(Severity.Valid, "Skipped History check due to other check being invalid.");
 
             WC6 MatchedWC6 = EncounterMatch as WC6;
             if (MatchedWC6?.OT.Length > 0) // Has Event OT -- null propagation yields false if MatchedWC6=null
@@ -581,14 +583,6 @@ private LegalityCheck verifyHistory()
                     return new LegalityCheck(Severity.Invalid, "Event OT Affection should be zero.");
                 if (pk6.CurrentHandler != 1)
                     return new LegalityCheck(Severity.Invalid, "Current handler should not be Event OT.");
-                if (pk6.OT_Memory != MatchedWC6.OT_Memory)
-                    return new LegalityCheck(Severity.Invalid, "Event " + (MatchedWC6.OT_Memory == 0 ? "should not have an OT Memory" : "OT Memory should be index " + MatchedWC6.OT_Memory) + ".");
-                if (pk6.OT_Intensity != MatchedWC6.OT_Intensity)
-                    return new LegalityCheck(Severity.Invalid, "Event " + (MatchedWC6.OT_Intensity == 0 ? "should not have an OT Memory Intensity value" : "OT Memory Intensity should be index " + MatchedWC6.OT_Intensity) + ".");
-                if (pk6.OT_TextVar != MatchedWC6.OT_TextVar)
-                    return new LegalityCheck(Severity.Invalid, "Event " + (MatchedWC6.OT_TextVar == 0 ? "should not have an OT Memory TextVar value" : "OT Memory TextVar should be index " + MatchedWC6.OT_TextVar) + ".");
-                if (pk6.OT_Feeling != MatchedWC6.OT_Feeling)
-                    return new LegalityCheck(Severity.Invalid, "Event " + (MatchedWC6.OT_Feeling == 0 ? "should not have an OT Memory Feeling value" : "OT Memory Feeling should be index " + MatchedWC6.OT_Feeling) + ".");
             }
             if (!pk6.WasEvent && !(pk6.WasLink && (EncounterMatch as EncounterLink)?.OT == false) && (pk6.HT_Name.Length == 0 || pk6.Geo1_Country == 0)) // Is not Traded
             {
@@ -696,10 +690,15 @@ private LegalityCheck verifyOTMemory()
             }
             if (EncounterType == typeof(WC6))
             {
-                if (pk6.OT_Memory != 0)
-                    return new LegalityCheck(Severity.Invalid, "Event Pokémon should not have an OT memory.");
-
-                return new LegalityCheck(Severity.Valid, "OT Memory (Event) is valid.");
+                WC6 MatchedWC6 = EncounterMatch as WC6;
+                if (pk6.OT_Memory != MatchedWC6.OT_Memory)
+                    return new LegalityCheck(Severity.Invalid, "Event " + (MatchedWC6.OT_Memory == 0 ? "should not have an OT Memory" : "OT Memory should be index " + MatchedWC6.OT_Memory) + ".");
+                if (pk6.OT_Intensity != MatchedWC6.OT_Intensity)
+                    return new LegalityCheck(Severity.Invalid, "Event " + (MatchedWC6.OT_Intensity == 0 ? "should not have an OT Memory Intensity value" : "OT Memory Intensity should be index " + MatchedWC6.OT_Intensity) + ".");
+                if (pk6.OT_TextVar != MatchedWC6.OT_TextVar)
+                    return new LegalityCheck(Severity.Invalid, "Event " + (MatchedWC6.OT_TextVar == 0 ? "should not have an OT Memory TextVar value" : "OT Memory TextVar should be index " + MatchedWC6.OT_TextVar) + ".");
+                if (pk6.OT_Feeling != MatchedWC6.OT_Feeling)
+                    return new LegalityCheck(Severity.Invalid, "Event " + (MatchedWC6.OT_Feeling == 0 ? "should not have an OT Memory Feeling value" : "OT Memory Feeling should be index " + MatchedWC6.OT_Feeling) + ".");
             }
             switch (pk6.OT_Memory)
             {