Character Color Change 
On the character select screen, select the character you wish to use, then press C Down, C
Left, or C Right to get an alternate costume or colors for that character. Press C Up to revert
back to the original colors. 

Play as Luigi 
To activate everyone's favorite neglected plumber, finish Practice Bonus Stage One with each
of the eight main characters. Luigi will then show up and challenge you. Defeat him to add him
to your line-up. 

Play as Capt. Falcon 
To activate the F Zero star, you must defeat the game at any level with any character within
20 Minutes. Falcon will then challenge you. Defeat him and he's yours. 

Play as Jigglypuff 
To open up the cute Pokemon, defeat the game. Defeat Jigglypuff when she challenges you
and you'll get her. 

Play as Ness 
To play as the Earthbound star, you must first defeat the game on Normal, with only three
lives and no continues. Defeat Ness when he challenges you and you'll win him. 

Sound Test 
Defeat Practice Bonus Stages 1 and 2 with all the characters, including the secret ones. The
sound test will then show up in the Data Option. 

Borrow a Life 
When playing a team multiplayer match,you can steal a life from one of the players by
pressing A+B+Z+Start. 
                          
Item Menu 
Play the Versus Mode 50 times and an item menu will become unlocked. The menu enables
you to set all the multiplayer options you would wish for. You can determine which items will
show up in the battles, and which won't. 

Classic Mushroom Kingdom 
To access the hidden classic Mario World 1 stage, beat the game's one-player mode with
each character. At the end, the game will tell you that you can now access Classic Mushroom
Kingdom in the versus mode. 

Credits Fun 
When you beat the game and the credits start to roll, you can use the Control Stick to move
the cursor in the middle of the screen. Press B while the cursor is pointed at a name to stop
the credits from scrolling to learn a little bit more about that person. 

Profile Fun 
On the character profile menu, you can move the characters by holding Z and moving the
stick.