Code Lyoko Codes -

Master code:
Go to the 3D game section. Press to pause game play, then press (x2), (x2), , , , , , , . This will unlock all combos, upgrades, maximum money, health refill, and power rejuvenation.

Evil Ulrich:
Go to the profile selection screen. Then, hold + and press , , , , .

 Web content:
Use the following codes on the game's official website at http://www.codelyoko.com to view videos and concept art. The codes are obtained during game play by completing the block puzzles in Hacking mode.

Dark Enemies wallpaper: 9L8Q 
Desert sketch: 6G7T 
Fight Video (Ulrich, Yumi and Scorpion combined): 4M9P 
FMV Ending: 5R5K 
Forest sketch: 8C3X 
Ice sketch: 2F6U 
Mountain sketch: 7E5V 
Overbike video: 3Q4L 
Overboard video: 8P3M 
Overwing video: 8N2N 
Scorpion video: 9H8S 
Scorpion wallpaper: 3D4W 
Sector 5 sketch: 5J9R 
Ulrich fight video: 9A9Z 
Yumi fight video: 4B2Y