Borrow a Life
When playing a team multiplayer match, if
you are defeated, but your team mate still
has 1 or more life in stock. You can use
one of his life to get back in the action by
pressing A+B+Z+Start. Be sure to ask for
permission from your friend.
Submitted by CSHsia

Change Outfits
You can change your character's outfits by
tapping the four C Buttons at the character
select screen. Some costume changes are
limited to colors, but characters like
Pikachu are also available with a hat.
Submitted by That Octopus

Get Mew in your Pokeballs
After you get all 4 secret characters you
can find Mew in your Pokeballs! It takes a
little bit of time, but you'll see one. If you
have the Secret Item Menu, set it to all
Pokeballs and it will be easier, or go to
training mode. Mew has no apparent effect
on the battle.
Submitted by ANTDocEvil

Item Menu in the Japanese Version
Go to Vs. Mode, pick any 3 computer
players and your favorite character to play.
Play the "stock" mode, and set the lives to
10. Change the computer handicaps to 5.
Play, if you are the victor, to you go the
spoils! Enter options under vs., then go to
items switch. You can choose what items
will show up and how often they do.
Bob-ombs galore! Infinite hammers!
Submitted by bmartin_81@yahoo.com

Kirby's Power Loss
Everybody knows that Kirby can swallow
his opponents and take on some of their
powers in this game, but what if you
accidentally "ate" a character you didn't
want -- and you want to pursue someone
else? Simple: Just press the L Button to pull
of Kirby's "Hello!" taunt and he will discard
whatever power he took on.
Submitted by Cranky's Island

Music Test
Complete Bonus 1 & 2 with all characters
including secret ones and a "music test"
option will be on the data screen
Submitted by N64Master

Play as Captain Falcon
To play as Captain Falcon, simply beat the
one-player game within 20 minutes without
using a Continue.
Submitted by Mewsix

Play as Jigglypuff
To play as Jigglypuff, beat the game within
20 minutes.

Play as Luigi
To play as Luigi, pass the Bonus Practice 1
with at least 8 main characters. When Luigi
challenges you, defeat him and he's yours.
Submitted by Tony Prabowo

Play as Ness (from Earthbound)
To play as ness, beat the one-player mode
with any character with 3 lives, on normal
difficulty. You must beat the game without
continuing.
Submitted by Pokemankev

Rotate Characters
You can rotate and view the characters
from different angles by entering the
character bio section and holding Z. You
can use the analog stick to move them
around.
Submitted by Rob Ledrich