Before inputting a single code, you must understand that Inazuma Eleven Strikers 2012 Xtreme does not have a built-in cheat menu. You cannot input a button combo on the title screen. Instead, you need:
C20E1794 00000002 3BC00064 9BC20084 60000000 00000000 Inazuma Eleven Strikers 2012 Xtreme Cheat Codes