The reviews I've seen of the two new GBA games haven't been entirely kind. Apparently it's more a collection of mini-games than what we're used to, and it doesn't hold up well. Check http://www.gamerankings.com
As for the Spyro PS2 game (also, I was excited at the time to learn, on the Gamecube) got even worse reviews (in the 50% range). A lot of the complaints were about the "been there/done that" gameplay (which never bothers me with platformers), but having played it on the Gamecube, I can tell you the framerate was horrible. I imagine the PS2 version is worse. And it wasn't very fun. Hopefully the new one coming this fall will fare better.