You don't need to input any codes to play import games with a Game Genie. Just start the game without any codes. However, if you want to play those games with codes, just do a search on the net for Game Genie codes for the ones that you want to play with codes. The codes will either be the same regardless of the region, or if seperate codes exist for different regions, then they'll be listed by each region. The only import games that you can't play with a Game Genie are the ones with region lockout chips. (like Pulseman) In those cases, you'll either need an import console, or you'll have to mod your system. But there's very few Genesis games that have region lockout chips.