The core RPG line was awesome when it first came out... but they really haven't done much to evlove it... the only major differences between Red/Blue/Yellow/Green/Whatever and Ruby/Emerald are just graphics and more Pokemon. They REALLY need to change the battle system... I'd love for the new Cube Pokemon game to have a revamped battle engine that really captures the excitement on a Pokemon battle.

As for spinoff games, the only one I really like it TCG. Pinball was okay too, though.