Someone posted a game genie code that worked in zsnes to bypass the 50/60hz check (terranigma does check for that right?) A real game genie can only modify a small section of the ram or whatever, and the pal protection wasn't in that area. However I don't think zsnes checks to make sure the code modifies the right area. Though maybe a pro action replay could work. I'll try a few games that check and see if I can get past with my game genie (my game genie is busted, got it used, it seems to change the code you enter into something else, still I'll try :)