The bosses of Cuphead are the main stars of the game. Although there are some run-and-gun levels, they take a backseat to the chaotic and difficult bosses you'll need to defeat to progress through the game. Each boss has several forms, and in Regular mode, the minimum number is three — with each phase alternating between extremely long and extremely short.
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To move between the phases you simply need to deal enough damage to the boss. However, there are a certain number of bosses across the base game and DLC that have Secret Boss Phases that can be triggered under the right conditions.
With the addition of The Delicious Last Course DLC, there are now four bosses that have a Secret Phase. These are The Root Pack, Djimmi The Great, Sally Stageplay, and The Howling Aces. There's also a whole Secret Boss Fight to unlock on Isle IV. The Secret Boss Phase can only be found in Regular or Expert Mode.
As one of the first bosses encountered, the Root Pack is quite easy to handle. Progress through the fight as normal until you defeat the Potato and move on to the Onion. Whatever you do, DON'T attack the Onion once it appears.
After a few seconds, it will smile before disappearing into the ground. The Carrot will then appear as normal along with another vegetable, a small Radish which will spin back and forth across the ground. You'll have to beat both to finish the fight.
This genie is notable for having more phases than any other boss. To unlock the secret phase, you'll need to make it to the fourth phase of the fight. Once there, Djimmi will appear and begin meditating with a spiral around his head. Switch to mini-plane mode while he does this until a light
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