Fun rpgs for DS and GBA?

[Theriise]

This might be stating the obvious, but has he tried pokemon conquest?
Some other suggestions I found fun other than the ones already stated are "summon night sword craft story" gba games and "digimon story" (Dawn/dusk/digimon story) for ds.
Hope this helps.

 

[Bacon Eater64x]

Golden Sun.
Golden Sun The Lost Age.
Golden Sun Dark Dawn.