Balloon Boppers is both a minigame and a freeplay game in Wii Party U

Friends WiiPartyU BalloonBoppers

Objective (Minigame) 

The player has to avoid their balloon being hit by the other players to win. The players can use 2 to hit their hammer and the plus control pad to walk around. If the player's balloon is hit, they can still hit other player's balloons but they stay in the same place they finished as.

Objective (Freeplay)

The player has to win 100 rounds without being hit. The CPUs are other Miis created by the player and have their balloon and shirt colored the same as them. The player only has 1 chance but up to round twenty the Miis will not hit the player.