Complete Crash Course multiple times to unlock additional courses.
Unlock extra arenas for Pikmin's versus mode.
Beat the 20 regular missions of Metroid Blast and 10 'Extra' Missions will become available for you.
A second player, with a wii remote, can help/distract you in most of the single player games. Octopus dance : A second player can play with the background by pointing and pressing the A button on the different objects. This will create some sound that could distract you while trying to follow the beat. Donkey Kong's crash course : A second player can point on the main player and hold the A button on your character. This will create a "slowing bubble" around your character that slows him down. Takamaru's Ninja Castle : A second player can hold the ennemies in place by aiming them and pressing the A button. It doesn't works on bosses. F-Zero Racing : A second player can destroy the many obstacles by aiming and pressing the A button. Balloon trip breeze : A second player can knock different objects out of their place by aiming them and pressing the A button.
To receive a particular stamp, complete the requirements listed.
Play 20 matches and you will unlock two more levels.
To unlock the credits you must become a star player in all 12 attractions. During the credits, you can run around and shoot stars with the L and R buttons.