if i remember my game genie/gameshark details correctly, then resetting should fix the problem. i don't know about the newer games, but on the older game boy and game boy color games, the enhancement device would alter a segment of code while the device was on. certain codes could adversely affect the game save if their effects were saved onto that file. however, once you reset the game's memory by clearing the save file, then all that "corrupted" memory should be erased and re-written. at least, it worked that way for me...