I've done that and I've looked at other eBay posts for the game and they look different than the one I got. Plus I looked up some of the other GBA games that the seller I got this from is selling, and they don't look like the real thing either. I'm just wondering if someone who has the game can confirm that the internals of the cart are fake.
1) The logo on the cartrige is too "sharp".
2) The maskrom, the board and everything inside isn't official. When it's written in chinese or japanese stop searching, it' not official (it could be a beta cartridge but it's so rare). And I don't think there is a gba game that have this blob in the middle (the only official cartridge I know with a blob is Tetris on the first gameboy, but I could be wrong).
I have 3 fake games like this one. I was pissed at fist but they've been working so far without any problem and they were not that expensive...
Still not as fake as a cart I was given by my cousin. The cart I was given had a front label that looked far off from that of a legitimate one, as well as a copyright on the back of the cartridge that said 'Nintondo' instead of the usual Nintendo.
Actually, my fake cartridges have these numbers. So if there are no numbers, it's fake for sure, but if you can see these numbers, it doesn't mean that the cartridge in official. Best way is to open the cartridge anyway.
Cammygirl192 got it! That easiest way to tell, from all of the fakes I have seen (in person and in photos), every single one of them has the ESRB rating (in Pokemon's case, always an 'E') in slightly the wrong font/style.