Code Lyoko - DS

Unlock all combos, upgrades, max money, health & power rejuvenation
In the 3D game section, press START to enter the pause menu and do the following: Press up, up, down, down, left, right, left, right, B, A, START

Unlock Evil Ulrich
In the profile selection screen do the following: Hold R and L buttons and press Up, Left, right, Y and X