checked-yes =>Magma Mountain: Once you play through all the normal game boards and have at least 980 coins in the bank you can buy the key to the Magma Mountain board in the shop. =>Eternal Star: Earn 100 stars to open up the Eternal Star board. =>Extra Options: Once you play through the Eternal Star board, you can buy the "No Boo", "No Koopa", and "View Credits" items in the shop. =>Coin Tips: Play a normal game OR a Pot O' Skills game with yourself and 3 computer players. If playing the Pot O' Skills, turn the handicap to 50. Right before the last turn begins, switch all the players to human control and finish the game. You will get the coins for all four players this way, not just the ones you earned as a human. =>Bumper Ball Maze Games: There are three extra mini games on Mini Game Island. Get to the end of the isle and beat Toad in Slot Car Derby 2 and you will open up Bumper Ball Maze 1. If you complete all of the mini games on the island as well, talk to Toad to get Bumper Ball Maze 2. Finally, earn high scores in BBM 1 and 2 to earn Bumper Ball Maze 3. =>Gumball Machine: Buy 30 games in the Mini Game house. There will now be a gumball machine in the Mushroom Shop. Drop money into it and you will play a random mini game. I'm not sure what the advantage of this is, though.