X-Men Legends cheats and cheat codes for Gamecube

Unlock classic costumes:
Finish the game once

Unlimited combo: 
Start the combo by pushing X then A, A, X, X, then keep repeating 
A, A, X, X, A, A, X, X, etc.

Change xtreme costumes: 
Press Up, Up, Right, Left, Down, Down, Start in the main menu. 
During game play, go to an Xtraction save location and 
press the button next to "Skin".

Unlock Beast: Finish level 1. 
Unlock Colossus: Finish the Nuclear Facility level. 
Unlock Cyclops: Beat Mystique. 
Unlock Emma Frost: Locate Emma Frost in X Mansion after the Nuclear Facility
Unlock Gambit: Finish level 3. 
Unlock Ice Man: Finish level 1. 
Unlock Jean Grey: Finish level 1. 
Unlock Jubilee: Finish level 2. 
Unlock Nightcrawler: Finish level 2. 
Unlock Psylocke: Finish the NYC Riot/Muir Island/Sewer level. 
Unlock Rogue: Finish level 1. 
Unlock Storm: Finish level 1. 
Colussus without metal, Colussus 90's: Beat the game.
Bobby Drake, Original Iceman: Beat the game.
Street Clothes Magma: Beat the game.
Wolverine 90's, Weapon X: Beat the game.
Storm's white outfit:  Beat the game.

Extra health and energy:
Fail at the Danger Room courses as many times as possible.
You will get health packs, energy packs, armor, etc.

Infinite life:
Go to main menu and press Up, Left, Down, Right