The Chuckolator is a large, pink-red creature that is made of Chuckola Cola. It has two silver rings wrapped around its body and holds a shield made of a barrel scrap.
The Chuckolator mainly attacks by using its blade to send tiny creatures at Mario and Luigi. It can use its shield to block attacks. When the shield is destroyed, the arm holding it changes into a gun that shoots balls of Chuckola Cola at the brothers. When the Chuckolator has taken a certain amount of damage, it will shrink in size with its only attack being a charge attack but having the chance to poison one of the Mario Bros.
First, destroy the shield. The Knockback Bros. technique is most effective for the boss. After that, attack and dodge until it shrinks. In small form, focus mainly on dealing damage, the player must counterattack, otherwise one of the Mario Bros. will be poisoned.