After the events of House of M and Decimation, X23 was one of the few mutants to retain her powers. X23, having previously left the institute off-panel, returns to the X-Mansion at Wolverine's insistence. Laura was assigned a room with Pikmin captain Olimar. She begins to develop an attraction towards Captain Louie while protecting him while participating in holographic combat simulations created for members of the student body by the President of Hocotate Freight.
Special Attacks
Decapitating Slice (Neutral)
X23 hops onto her opponent's back and slashes them once before hopping off to push them upward with her foot talons while saying "Too slow!".
Neck Slice (Side)
X23 says "You're MINE!" and performs a rush upward-aimed dash slash. Can be charged.
Talon Attack (Up)
X23 jumps up, then she charges in midair in a horizontal kick while she says "Try THIS!".
Ankle Slice (Down)
X23 performs a dashing slash attack close to the ground.
Rage Trigger (Hyper Smash)
X23 says "Fight's OVER!" and then she performs two forward somersaults with all claws exposed and finishes with a reverse upward backflip.
Silent Kill (Final Smash)
X23 says "DIRT NAP!", then she teleports to the nearest opponent, appearing above them and stabbing them in the back of the head as she says "BYE BYE!".
Victory Animations
X23 brushes her claws against each other and poses as she says "Get out of here BEFORE I REALLY GET MAD!".
X23 tilts her head with her claw to the side while saying "I cannot... will not... lose!".
X23 bows with her claw extented while saying "So... who's the best there is, again?".
Trivia
X23 was confirmed at the same time Sentinel was confirmed in Super Smash Bros. Tourney.
X23 shares her English voice actress with Blink the Mole and Raven.
X23 shares both her English and Japanese voice actresses with Harley Quinn (partially).
Before Super Smash Bros. Tourney, X23 was known as "X-23".
X23's rival in Super Smash Bros. Tourney is Olimar and his Pikmin.