Hamtaro Ham Ham Heartbreak may quite possibly be the most awesome non pokemon GBA game in all of history.
You aren't possibly familiar with RxkQueen are you? Not too long ago, she game that game a lot of publicity.
You serious bro? o-o
Anyways, picked up a few random titles today.
Pokemon Emerald (I can't resist! I've been wanting another for awhile xD), Reign of Fire (no clue but it was $1, what do I have to lose?), Digimon Battle Spirit 2 (looks like a semi-decent fighter, at least for when I wanna kill a few minutes), Boktai (actually really excited about trying this one once the sun comes out- looks like it'll be a blast).
Boktai 1 or 2? Both are good but the first is a bit too metal gear for my personal tastes.
Me personally? I've been at the Viet Pokemon Crystal, but you knew that, right Moose have a pillary.