Bunny Hood
From Mariopedia, a wiki on Mario, Yoshi, Wario, Donkey Kong, Super Smash Bros., and more!
The Bunny Hood is a item in The Legend of Zelda: Ocarina of Time. The Bunny Hood appears in the Marioverse once in Super Smash Bros. Melee. It allows the player to jump much higher than normal.
Interesting to note is that in Super Mario Land 2 the carrot item gave Mario bunny ears. Sound familiar?