My hands down favorite GBA game is Pokemon Ruby/Sapphire/Emerald. It's not even close. I have 250+ hours across those three games, and that's only counting my NTSC physical copies and not emulators or ROM hacks. In fact, I am so stuck on the third generation that I purified a Shadow Pokemon from Pokemon Colosseum and earned the max possible ribbons on my Flygon, Jinn. He currently has 67 ribbons and has been vacationing in Pokemon White for a long while.
So far, I haven't played any GBA games that I think are truly miserable and not worth a couple bucks or a half hour of my time. Nevermind, I just remembered that Medal of Honor Underground exists. At least my game can't possibly be the ugliest shooter on GBA!
Most people would say that the GBA Video cartridges haven't aged well, or that they're not even games at all! I disagree on both counts, insisting that their nuclear-blasted visuals and rusty garbage truck audio is what makes them classic history pieces.
I have been fascinated with the potential of first person shooters since I first learned that Doom made it to the system, and my love for the abominable concept has only grown deeper the more I come to understand just how much this shouldn't have happened on the hardware.