Successfully complete Star Battle mode with any character to unlock Bowser's Warp Orbit.
Play as Blooper and Hammer Bro.
Successfully complete Star Battle mode with any character to unlock Blooper or Hammer Bro. Successfully complete Star Battle mode a second time with a different character to unlock the other character you did not unlock the first time through.
Mini-game Wagon
Successfully complete Star Battle mode to unlock the Mini-game Wagon, which allows you to buy mini-games.
Crown Showdown mini-game
Unlock one 4 player, 1 vs. 3, 2 vs. 2, and Duel mini-game to unlock the Crown Showdown mini-game.
Flip Out Frenzy mini-game
Unlock one 4 player mini-game to unlock the Flip Out Frenzy mini-game.
Test For The Best mini-game
Unlock Test For The Best mode in the Fun Bazaar to unlock the Test For The Best mini-game.
Tic Tac Drop mini-game
Unlock one Duel mini-game to unlock the Tic Tac Drop mini-game.
Easy dart shooting
As the target you are aiming for gets to about the 9 o'clock position, or slightly after, throw the dart. If timed perfectly, you will hit what you are aiming for.