Board Thread:Super Smash Bros. Discussion/@comment-25462958-20140925145732/@comment-6604133-20141028212716

Raze200 wrote: Still is there the option to purchase mewtwo? If not I will be depressed.

I can't imagine Nintendo making him available ONLY to people who buy both versions. My guess is, they'll release him for people who own both versions, then a few weeks later, release him for about $5 for the 3DS and Wii U versions alone.