Reccomend a good Gba rpg with requisites?

Being a long loving fan of the rpg, i have amassed a great collection, many being on my favorite portable console: the gameboy advance. but one thing iv noticed is that my library is missing a specific kind of rpg: the kind where you choose your own class. Iv seen this in some games, like dragon quest or many online browser rpgs, but i wanted to know if there were any on the GBA. if there are no good ones like this, feel free to reccomend for the DS.