@OutofPrintArchive "It's all 3D now, but we much preferred the GBA port's graphics..." The GBA port had a really buggy implementation of the Active Time Battle system, to the point where your characters might never get turns anymore. One character's high-level HP growth was also bugged in US (but not EU), so while I finished the game and got to the GBA bonus dungeon, I gave up on playing any more of it.
DS did change the way item drops are handled for the worse, but that's my only negative.