There is no Wish Tag in the game. You cant get it with the Gameshark, or without. Deoxys and Jirachi must be obtained from alternate sources, like E-Reader Cards, Nintendo Promotions, and Pokmon Coliseum. There are a lot of Wish Tag topics around, and so people usually get upset at their creators. Im going to close this to spare you that, take a look around for some of the other Wish Tag topics.
You're welcome to make a thread about the spots on Togepi though. ^_^;