The SNES Game Genie is a finicky thing. There are two versions, and it's not easy to tell which is which; Version 1 will have the dashes already there for all four lines of codes whereas in Version 2, they don't appear until you've entered the first four digits of that line. This is important because older Model 1 Super Nintendos work fine with either, but newer Model 1 Super Nintendo's only work with Version 2 - only two lines of codes for Version 1 works. With the Model 2 SNES ("SNES Mini"), Version 1 doesn't work AT ALL, and only two lines of codes works with Version 2. If you have an old SNES, great. I have a Model 2, though, so I'm SOL.