While the standard battles in the arcade version of Pokkén Tournament have you either face online against other players, or face against the computer which plays as various other Pokémon in the other game, there are special Extra Battles that include even more unusual Pokémon.

Shadow Mewtwo

Release: October 30th 2015

As of the version update, J04, which went online on October 30th, if you go for a single player match and lose 2 out of the 3 matches, you will then get challenged by another character. This character faces you with a special Shadow Mewtwo. This Mewtwo is different in colour and has various molten rocks coming out of its body. Before the battle begins, it Mega Evolves into a Shadow version of Mega Mewtwo X. It has 1,000 Hit Points