From the Super Mario Wiki
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The mission occurs in some paper terrain. The objective is to evade a Boo while dodging other obstacles for one minute and thirty seconds. In addition to the Boo, there are additional obstacles, such as moving flames and paper Giant Bob-ombs. If Mario and co. manage to evade the obstacles long enough, the mission is completed. If they get hit by any obstacle three times, they get an instant "Too Bad!"
In the Hard Mode variant, Mario and co. cannot take damage once, and the obstacles are trickier to avoid.
Hard Mode Objective
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