All Golden Sun games, Fire Emblem, Final Fantasy Advance, Castlevania Circle of the Moon, Megaman Zero 3, Mario and Luigi, Zelda, Advance Wars, Yoshi's Island, Wario land, Wario Ware and some Kirby games
I enjoyed a lot Dragon Ball games, Medabots, Star Wars, Megaman Battle Netowrk and Yu-gi-oh games but objectively speaking I don't think they were good. There are some others I probably liked back then because of my age.
Also, I remember there were a lot of really good JRPG's on the GBA but I can't remember names at the moment. =/







