From the Super Mario Wiki
Superspicy Curry is an item from the Kirby series that appears as an item in Super Smash Bros. Brawl and Super Smash Bros. for Nintendo 3DS / Wii U. It is incredibly spicy, with flames emitting from the food. When eaten, the player will keep breathing out tiny fire balls that cause damage to foes, in addition to the consumer becoming faster. The effects will wear off over time. Also, when idle, the fighter under its effect is shown to be humorously uffering the effects of its spiciness, jumping around and waving at their mouth. Superspicy Curry is also an effect that can be turned on permanently for all fighters in Special Brawl.
Super Smash Bros. Brawl
Super Smash Bros. for Nintendo 3DS / Wii U