It can be picked up and thrown or hit to be opened. When picked up, it can be thrown but as soon as it hits the ground, a character, or an attack, it floats up and makes a little jingle and then opens up to reveal its items inside. Like Crates and Barrels, while holding a party ball, a character's speed is drastically decreased, and they will not be able to jump or attack.
Note that an item will only appear in a Party Ball if that item can be used. Otherwise, for example, if only bombs are on, it will always have a bomb party. Likewise, if the Party Ball is the only item enabled, all they will do is explode.
Damage throughout the series
Party Balls are just what they sound like: a recipe for wild fun packed into a paper ball. Throw or strike one into the air, then wait for it to trigger its time-release. Parties are always unpredictable, so here are the odds on how zany your party might be: Self-destruction: 10% Food banquet: 36% Bob-omb fest: 12% Other: 42%
A giant ball stuffed to bursting with items and food. Throw it or attack it, and after a few seconds, it will burst open with fanfare, spilling items all around. The fluttering confetti adds to the celebratory atmosphere. Some Party Balls are filled with nothing but bombs, though, so handle with care. Perhaps if you just pulled the string...Naw, that doesn't work.