Bowser's Magma Mountain
To unlock Bowser's Magma Mountain, get
1000 coins and you can buy the key to the
extra stage Bowser's Magma Mountain in
the shop.
Bumper Ball Maze 1
To access the mini-game "Bumper Ball
Maze 1," you must reach the goal of
Mini-Game Island and defeat Toad in a
game of "Slot Car Derby 2."
Bumper Ball Maze 2
To unlock Bumper Ball Maze 2, you must
clear all 50 Mini-Games on Mini-Game
Island and then go talk to Toad at the Goal.
Bumper Ball Maze 3
Once you have set new records on Bumper
Ball Mazes 1 & 2, Bumper Ball Maze 3 will
become selectable.
Eternal Star Stage
To unlock the Eternal Star stage, get 100
stars and you open up the Eternal Star
stage.
Fill Mushroom Bank Easily
Every time players complete a game, the
stars and coins from each human player are
put into the Mushroom Bank. However, if
computer players are filling in, those coins
and stars are lost. An easy trick to
accumulate lots of stars and coins is to
switch all players to human in the last round
of the game. (You can do so by pausing
and accessing the options menu.) Complete
the board and you will be able to keep
ALL the stars and coins.