I've never played a Megaman game in my life (I based my GBA years on Pokemon, Mario, Zelda, Spyro, Crash Bandicoot and others) but I've been looking at some gameplay and I love the way the games look!
So what's the best? Why? I have a GBA and a DS.

I know it's hard to get your hands on GBA games in a store now, so I suppose I could just order on amazon or something.