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Deny is the first captain command in the Minion Quest: The Search for Bowser mode of Mario & Luigi: Superstar Saga + Bowser's Minions. It costs one CP to use. When used, the captain can cancel out any Special Skill about to be used by any opponent, preventing them from using the moves. It cannot stop regular attacks, and it cannot be used to cancel any opposing captain commands.
Deny returns as a captain command in Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey where it is used by Bowser Jr. If Special Skills from a group of identical enemies are performed at the same time, at least one will be immune to the effects of Deny. An enemy under the effects of Malatone Formula:X, as well as Broque Madame are completely immune to Deny, though a first officer's Stop and Drop command can still stop the Special Skill.