diff --git a/include/constants/battle_config.h b/include/constants/battle_config.h
index 8a65728746..d0ed6c3572 100644
--- a/include/constants/battle_config.h
+++ b/include/constants/battle_config.h
@@ -1,6 +1,18 @@
 #ifndef GUARD_CONSTANTS_BATTLE_CONFIG_H
 #define GUARD_CONSTANTS_BATTLE_CONFIG_H
 
+// Species with peculiar battle effects. Remove them if they're properly placed in constant/species.h
+#define SPECIES_DIALGA 0
+#define SPECIES_PALKIA 0
+#define SPECIES_GIRATINA 0
+#define SPECIES_CHERRIM 0
+#define SPECIES_ARCEUS 0
+#define SPECIES_SILVALLY 0
+#define SPECIES_GENESECT 0
+
+// Items with peculiar battle effects. Remove them if they're properly placed in constant/items.h
+#define ITEM_GRISEOUS_ORB 0
+
 #define GEN_3 0
 #define GEN_4 1
 #define GEN_5 2
diff --git a/include/constants/items.h b/include/constants/items.h
index c02b06273a..3a894f8ff6 100644
--- a/include/constants/items.h
+++ b/include/constants/items.h
@@ -475,6 +475,4 @@
 // Check if the item is one that can be used on a Pokemon.
 #define ITEM_HAS_EFFECT(item) ((item) >= ITEM_POTION && (item) <= ITEM_0B2)
 
-#define ITEM_GRISEOUS_ORB 0
-
 #endif  // GUARD_CONSTANTS_ITEMS_H
diff --git a/include/constants/species.h b/include/constants/species.h
index afb250d6ac..02e5ea3964 100644
--- a/include/constants/species.h
+++ b/include/constants/species.h
@@ -447,13 +447,6 @@
 
 #define NUM_SPECIES SPECIES_EGG
 
-#define SPECIES_DIALGA 0
-#define SPECIES_PALKIA 0
-#define SPECIES_GIRATINA 0
-#define SPECIES_CHERRIM 0
-#define SPECIES_ARCEUS 0
-#define SPECIES_SILVALLY 0
-
 // National Dex Index Defines
 
 #define NATIONAL_DEX_NONE 0
diff --git a/src/battle_util.c b/src/battle_util.c
index 166c801fb2..7c5eccc2b8 100644
--- a/src/battle_util.c
+++ b/src/battle_util.c
@@ -6115,6 +6115,10 @@ bool32 CanBattlerGetOrLoseItem(u8 battlerId, u16 itemId)
         return FALSE;
     else if (species == SPECIES_GIRATINA && itemId == ITEM_GRISEOUS_ORB)
         return FALSE;
+    else if (species == SPECIES_GENESECT && GetBattlerHoldEffect(battlerId, FALSE) == HOLD_EFFECT_DRIVE)
+        return FALSE;
+    else if (species == SPECIES_SILVALLY && GetBattlerHoldEffect(battlerId, FALSE) == HOLD_EFFECT_MEMORY)
+        return FALSE;
     else
         return TRUE;
 }