If you're thinking about getting this game, don't! It's just a high price on obsolete games.
Okay, I really don't have to run through the whole point of Megaman, as it hasn't changed from the classics to the new Megaman Zero games for GBA, so I'll skip through that.
So I'll go to the core. You venture around a kind of lab, with doors linking you to the games and unlockable content. But, frankly, it's not that good. They made it just like the games, and if you ant to play Megaman 7, it's a good while before you get to your door, which is quite annoying. If they had made it 3-d, it would've been much easier, but they didn't.
The graphics they made are bad. They based it on Megaman 7 graphics when they couldv'e used a much better look. It just doesn't look good anymore. And don't get me started on the sound. The music they add to the menu/lab is just plain awful. It sounds tacky and quite annoying.
Then there's the unlockable content, which, frankly, plain old sucks. They didn't add enough to make it good, and it just doesnt seem feasable to put such a price tag on it.
Now don't get me wrong, I have no problem with he classic Megaman games. But, frankly, I wouldn't reccomend getting this game. It's just not worth it, unless you are an obscenely hardcore Megaman fan.