For me:Metroid FusionFinal Fantasy VI AdvanceLegend of Zelda (In general)Megaman Zero (In general)Pokemon (In general)Golden Sun (Haven't played Lost Age though)I've obviously missed some. I've played too many GBA games back in the day.
-Golden Sun games-Advance Wars games-Final Fantasy (insert number here) Advance series(assuming you can shrug off the nerfed difficulty)-Super Mario Advance series-Warioware Inc. series-Metroid Fusion/Zero Mission-Mega Man Battle Network 2, 3, 5(?), 6-Pokemon series-Megaman Zero series-The Legend of Zelda: Minish Cap-Castlevania: Aria of Sorrow-Mario and Luigi: Super Star Saga-Sonic Advance series(for the most part)-Sonic Battle(battles may or may not get repetitive)-Tactics Ogre: The Knight of LodisThose are my recommendations. I might have missed a couple of them.
Tactics Ogre: The Knight of LodisCastlevania Double PackOnimusha TacticsFinal Fantasy TACT Special Forces 3
