Heart Boost

A Heart Boost is a power up item which appears in Donkey Kong Country Returns.

Donkey Kong Country Returns
The Heart Boost debuted in Donkey Kong Country Returns, where it can be purchased at Cranky Kong's Shop for twenty Banana Coins. If used, an additional heart is added to the Kongs' health bar. The item's effects wear off if a level is finished, exited, or if a life is lost. Like the other inventory items, this item cannot be used in Mirror Mode. In two player mode, this item, as well as all the others, can be only used by either Donkey Kong or Diddy Kong.

Donkey Kong Country Returns 3D
The Heart Boost reappears in Donkey Kong Country Returns 3D, the Nintendo 3DS re-release of Donkey Kong Country Returns. If used in the new Easy Mode, the Heart Boost raises the Kongs' health bar by three hearts, as opposed to two in the original Wii version. An additional item at Cranky Kong's Shop plays a similar role, but instead of it raising Donkey and Diddy's health, the item increases the durability of Mine Carts and Rocket Barrels.