Okay, This seems like it would work, but i use CFG USB Loader with the games, not on a disc. and the codes usually work for other games on the same loader, and even on black ops story mode. But it doesnt work for zombies. none of them do and this way seems like the way i have been doing. So im not sure what to do on how to get it to work on zombies on this game.
~UPDATE!
Got it Some cheats to honestly work NEED a activator! Unlike other normal codes these codes need you to edit some things to add a button on your wii mote as an activator. Thanks for the help sinnoh