diff --git a/data/moves.js b/data/moves.js
index 3d7d9d1173..3a044ef631 100644
--- a/data/moves.js
+++ b/data/moves.js
@@ -1216,7 +1216,6 @@ let BattleMovedex = {
 			return move.basePower;
 		},
 		category: "Physical",
-		// TODO: Check to see if power doubles against Gigantamax
 		desc: "Deals double damage against Dynamax and Gigantamax Pokemon.",
 		shortDesc: "Double damage against Dynamax/Gigantamax.",
 		id: "behemothbash",
@@ -1239,7 +1238,6 @@ let BattleMovedex = {
 			return move.basePower;
 		},
 		category: "Physical",
-		// TODO: Check to see if power doubles against Gigantamax
 		desc: "Deals double damage against Dynamax and Gigantamax Pokemon.",
 		shortDesc: "Double damage against Dynamax/Gigantamax.",
 		id: "behemothblade",
@@ -16848,7 +16846,7 @@ let BattleMovedex = {
 		flags: {protect: 1, mirror: 1, authentic: 1, mystery: 1},
 		onTryHit(target, source) {
 			let bannedAbilities = ['battlebond', 'comatose', 'disguise', 'illusion', 'multitype', 'powerconstruct', 'rkssystem', 'schooling', 'shieldsdown', 'stancechange', 'wonderguard', 'zenmode'];
-			if (bannedAbilities.includes(target.ability) || bannedAbilities.includes(source.ability)) {
+			if (target.volatiles['dynamax'] || bannedAbilities.includes(target.ability) || bannedAbilities.includes(source.ability)) {
 				return false;
 			}
 		},