Board Thread:Super Smash Bros. Discussion/@comment-25462958-20140925145732/@comment-6604133-20141005213254

GreninjaBoss11 wrote: All characters are collectable trophies.

Yes, you unlock the playable characters' trophies by beating Classic mode with them. But Mewtwo already has a collectible trophy that you get some other way (whatever it is in this game, I don't have it yet). It would be stupid to change how to unlock it, and it would be stupid to have 2 different ways of unlocking it.