Gameballs are capsules that come from the Gameball Machine, an item from Mario Party. This item appears in the Mushroom Shop after thirty Minigames have been bought from the Mini-Game House. Players can buy a Gameball from the machine for three hundred coins.
Every Gameball contains a random Minigame that has not been seen or purchased yet at the Mini-Game House. This provides an alternate way for players to unlock all Minigames; while the price changes at the Mini-Game House, the price for a Gameball stays at a consistent three-hundred coins.
The Gameball's name is a portmanteau of the word "gumball" (a candy item it parodies) and "game".
Gallery
Hammer Drop, a random mini-game