1 UP Heart

1 UP Hearts (alternatively 1UP hearts, 1-Up Hearts, or simply Hearts ) basically perform the same function as 1-Up Mushrooms, granting one extra life to the player in Super Mario Land, Super Mario Land 2: 6 Golden Coins, and Donkey Kong on the Game Boy. The most likely reason that 1 UP Hearts are used in these games rather than 1-Up Mushrooms is that the black-and-white palette of the original Game Boy would make it impossible to distinguish between 1-Up Mushrooms and Super Mushrooms.

Unlike most Mushrooms, in Super Mario Land, a 1UP Heart will remain in one place until Mario grabs it. However, in Super Mario Land 2: 6 Golden Coins, the 1-Up Heart moves like the 1-Up Mushroom and slides right unless Mario can quickly catch it. Also in Super Mario Land 2, the 1-Up Hearts can be caught by a Keipu, who then runs away with them. In bonus games that occur if Mario rings the bell placed hanging in the air at the end of a stage, 1-Up Hearts become available prizes; in the game with crane and conveyor belt, 3UP Hearts also appear and give three extra lives. In both games, the hearts can be found in minigames.

In Donkey Kong on the Game Boy, 1 UP Hearts float in mid-air at spots that are hard to reach without special moves. They reappear if the player loses a life and revisits the level.

Similar items appear in "Modern" versions of Game & Watch games in Game & Watch Gallery and its sequels. These hearts replenish a life that was lost and only appear when a player reaches 200, 500, and 700 points in most games; if a player does not have any misses when they pass these points, a heart does not appear. In this game, they are pink and have a two-toned color scheme similar to the one suggested by the white and gray pattern of the original hearts in Super Mario Land.