Kirby's Crazy Appetite
From SmashWiki, the Super Smash Bros. wiki
Kirby's Crazy Appetite (known as Hungry Hungry Kirby in PAL versions of the game) is a single-player event match in Super Smash Bros. for Wii U. The player controls Kirby at 100% damage on Easy, 125% damage on Normal and 140% damage on Hard, and must heal all of his damage by eating the food that spawns all over the stage. 3 King Dededes, each with 50% damage on Easy and Normal and 0% damage on Hard, will fight Kirby at high speed, with 2 more appearing after some time has passed. The player only has 2 minutes to complete this event match. Danger Zones only do 5% damage in this event, instead of the usual 25%.
This is one of two event matches in the game that does not allow the use of customizations (the other being It's Past Your Bedtime!), for the potential reasons that any sort of auto-healing equipment will sidestep the objective of the event, and using the Ice Breath custom move would make the event much harder to complete.
This event is unlocked by clearing New Challengers 1. Completing the event unlocks the left path.