*Shadow Mewtwo is the supposed alternate form of Mewtwo in the game, and serves as the main antagonist for most of the story mode of Pokkén Tournament.

Being a Technical fighter, Shadow Mewtwo is an extremely potent Burst fighter that has lots of combo options and setups for high damage racking. It's many forms of deriviations from a single one of its Pokemon Moves gives it a wide range of choices when acting and allow it to battle with unpredictability when using variation moves like Psywave and Reflect.

It also has one of the only self-heal moves in the entire game, the only other ones being Sceptile's backwards ranged attack and Darkrai's Phanthoms, though the latter requires some beforehand actions in order to work.

In addition, having a 100CC burst volume, 2 phase shifts can usually fill up the Synergy Gauge and allow it to use one of the most powerful burst attacks in the game, Dark Nova. It's hitbox is one of the largest in Pokkén Tournament, and it's damage output is really only outshined by Blaziken's Gatling Flame Kick.

Although, Shadow Mewtwo also has some serious flaws on its side too, the most notable of which is his squishiness. Shadow Mewtwo has the lowest HP count in the game, 480. In addition, all of his Pokémon Moves except for Recover drain Shadow Mewtwo's health, making counters and blocks vitally important when using it.

It can get so bad that sometimes Shadow Mewtwo has to rely on Burst Activation to restore lost health. A lot of his X attacks are easily punishable as well, and this literally makes Shadow Mewtwo a glass cannon of sorts.*