Massive visual improvment over Gen's 1 & 2, GBA really felt like you had SNES quality games on the go. Unfortunatley many Pokemon are still useless due to the lack of physical/special split, and this probably has the weakest postgame in the series till this day. Overall Hoenn is still a great region with many memorable locations & Pokemon, plus the legendary Gen 3 trumpets leading the awesome soundtrack.

(Good luck if you pick Treeko)