By Quetzalcoatl.Kainstryder 2013-01-19 23:13:00
RPG wise, I highly recommend Final Fantasy IV, as it's a unique version, allowing you to reget all party members at the end of the game, with new dungeons, party swapping, gear etc. Final Fantasy V for it being better than the PS1 version and Final Fantasy VI also is a good choice. Tales of Phantasia, solid game, but it's a bad port for the GBA. Sword of Mana if you liked Secret of Mana, obviously the Pokemon games, my recommendation being Fire Red/Leaf Green, wasn't a fan of the others, but there's Ruby/Sapphire if you care. The 3 Castlevania games, Circle of the Moon, Harmony of Dissonance and Aria of Sorrow, all solid action/RPG, same goes for Metroid Fusion and Zero Mission. If you care for DBZ, the Legacy of Goku games are surprisingly fun (NOT the first game, AVOID).
Strategy games, definitely try Tactics Ogre: The Knight of Lodis. Final Fantasy Tactics Advance isn't bad either. I can't recommend Onimusha Tactcis, but you can check it out. Fire Emblem also is decent.
Fighting, Street Fighter Alpha 3 is a surprisingly good port and again, DBZ, Supersonic Warriors is pretty fun.
That should keep you busy for a while.