This copy of Tetris was bundled in with a couple of other games I bought. It has a sticker on the back with a few cheat codes. Anybody remember the GameGenie system? :
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/001_pokemon-fire-red-cheats-codes-and-walkthroughs-4778940-66f47d8329c044929a4867997f688b6f.jpg "Pokémon Fire Red: Cheats, Codes, and Walkthroughs")
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Pokémon Fire Red: Cheats, Codes, and Walkthroughs
Gameboy Secret Codes 2 (Brady Games)
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User guide: Cheat codes · OpenEmu/OpenEmu Wiki · GitHub
