I want to cheat on a real game I own, but I don't have the hardware. But is it possible to use a flash cart to cheat? I've heard of Nitro Hax, but the last time I saw it used, it corrupted saves. Is there an alternative to cheating that works?
NitroHax is great, it has never corrupted any of my save files, go for it
As for any alternatives, well you could dump your save, slap it on your flashcard, play with cheats on it there, and then you can restore the save back to the gamecard, very impractical, and very confusing.
Did you remember to add a xml file, if not add one with the codes. i have had no trouble out of Nitro Hax on the r4, except it does not like if the codes are in folders then it just freezes, but that is the only problem.