Just wondering what the origins of the game are - did you by any chance purchase it on Ebay? There's a lot of fake Gameboy Advance games there, on Amazon, and everywhere to be honest. Just wondering where the game cartridge originated from, if you bought it new, etc. Please let me know, thanks.
I originally got it from Gamestop a few years ago, when they still sold the older games. This is indeed a real game and I have played it several times in the past.
GameStop has sold my fake GBA carts before. It's really hard to tell if they're fake or not unless they're the Pokemon games. Literally impossible to tell, but as long as it works it's hard to complain. When you start up the game it doesn't take you to some sort of funky menu does it? Just loaded the Nintendo screens and stuff then takes you to the game title? Some of the fake carts say stuff like 'this game was brought to you by klown', which are the groups who make the fake carts. I purchased a fake cart by accident before and that popped up upon game start up. Obviously, for collection purchases the only way to be 100 percent sure a cart if legit is to get it new/sealed so it's a moot point. This one might as well be real.
I just started it up to make sure, and as I had said earlier, this is legit. No false startups. I won't try to scam you with anything fake like most others might.