I think you enter them with an ActionReplay, butthe codes are REALLY long. (At least the "Walk-Through-Walls" one is!)
u have to enter the cheat codes in an action replay.
well you buy a cheat ds game at futershop and enter it and it will have the cheats
you don't
no
you dont its doesnt accept codes [=
Because you can't
You either buy an action replay or you borrow one from a friend
You need an action replay which you can buy at best, target, gamestop, walmart,etc.
you can get arceus cheats
no but you can if you have cheats
you don't have friend codes in soul silver.
Turn on your action replay and insert Heart gold or soul silver. After the codes roll press codes and a code will appear on the screen. Go to enter new game and enter the code from the screen. It will appear as the code you have entered, not heart gold or soul silver. Scroll down until you find it and press the A button. Then click the enter code option.