This is the move Sora uses
Counter (カウンター, Counter) is Sora's down special move in Super Smash Bros. Ultimate.
Overview
Sora shifts his Keyblade into a defensive stance. Opponents that hit Sora in this state will be staggered and Sora will hit them back. Projectiles will continue their normal trajectory, but will miss Sora and have a 1.4x damage multiplier applied to them.
Origin
Counterattack is a combat ability introduced in Kingdom Hearts. It is used in conjuction with the parry system to immediately attack a staggered enemy. In the game, Sora will learn the move if he is at level 24 with the Dream Sword, level 21 with the Dream Shield, or level 18 with the Dream Rod (Level 57, 45 and 15 in the Final Mix version). It costs 2 AP to equip.