Bowser Land:
Beat all of the boards to open up Bowser Land.

Mini-game Coaster:
Buy all of the mini-games from Woody.

Driver ED. Mini Game:
Beat all the games in the mini-game coaster

Taunt:
Hold L during your opponent's turn to taunt them.

Buy Item and Battle Mini-games:
Beat the Mini-game Coaster on Normal. You can now purchase Iitem and Battle Mini-games.

Get To The Shell Shocked Mini-Game End Boss:
On the mini-game Coaster, beat all 8 worlds on the Hard Course. This will take you to the Shell Shocked mini-game where you'll face the Baby Bowser Bunch.

Easily Earned Coins and Stars:
Start a new game, and then, go to Settings. Change your player to a computer player and then let the game go by itself. Go watch T.V. or do something else, and before it's over, change the settings again, and pick the highest player as you, and then you win without going through a whole game of just sitting around! Now that's what I call easily earned stars and coins! This also works for Mario Party, and Mario Party 3.

Thanks to Revolution readers Aaron Illingworth, CodeWizard, Caterpie99, Jess Knaster, kyle, §ebulba, David Cusson and DJ!