Mewtwo is being added to Super Smash Bros. for Wii U and Nintendo 3DS as add-on content, and will be free for all buyers of both versions of the game.
Nintendo has today confirmed that the Pokémon fighter will eventually be available for all users to purchase as add-on content for a price. No details on exact dates were announced.
Full details on acquiring the character for owners of both games are below:
Promotion participants who qualify between 23:00 (UK time) on January 20th and 22:59 (UK time) on March 31st 2015 will be able to add the powerful character Mewtwo to their game by claiming two free download codes - one for Wii U, one for Nintendo 3DS. The free download codes for Mewtwo will be distributed in spring 2015. The character will be made available to purchase as add-on content in the future.