The Wii had the better games for me (it's my opinion, I don't state it had the better games for everyone): MHTri, Zelda:TP and Zelda:SS, Fire Emblem, Xenoblade, Pandoras Towers.
PS2 has also good games, but don't match the Wii: Okami (but that's also on Wii), Wizardry:Tales of the forsaken land, Beyond Good and Evil.