A mode where stages are short but difficult. It is most likely to unlock when the player finishs a adventure level and a screen will pop up saying "you want to take a challenge?" and the options are "Bring it! and Nah". To unlock a challenge quicker, just simply pay 399 Skullies to play. They can be replayed in the Challenges menu.

playing on this mode, or the flash game is the only way you can get a chance of seeing the secret monkey. but the chances of seeing the secret monkey on this mode is still limited, if you are searching for him the flash game is your best bet.