Tabuu is a blue matrix-like humanoid who became recently enemies with Master Hand.
He was created in 1,242,342,754 BCE. Tabuu was created by subtracting the Chuck Norris and Weegee from Chuck Norriseegee and sending the remaining DNA through a black hole. Through an unknown process, he absorbed the black hole, which made him kind of a demigod.
Tabuu has thirteen different attacks; all of which can be explained here:
His thirteen moves
His first move, Shark Blade: He turns into a blade resembling an shark and charges.
His second move, Diving Slash: Tabuu appears high and transforms into an energy blade. Then, he dives to the surface and rams/stabs the enemy.
His third move, Golden Bracket: He transforms into a cage of energy, resembling two golden brackets, then flies and captures his opponent and plows them into the floor.
His fourth move, Chain of Light: Tabuu creates a golden chain and throws it in order to catch his opponent.
His fifth move, Electrical Shield: The purple sphere inside his torso splits into several fragments, which fly in circles around him for a short time while emitting electricity. This attack has a decent range, but leaves Tabuu wide open for projectile weapons.
His sixth move, Rapid Chop: Tabuu teleports behind his opponent non-personnelly and repeatedly karate-chops the enemy. This move can juggle opponents, though has less range than other attacks.
His seventh move, Pinpoint Explosion: From one side of his foe, he preforms a pointing gesture. Five locations along a line leading to his opponent's current location will flash golden once and explode after about two seconds.
His eighth move; Ghost Projection: Tabuu shoots out many ghost images of himself in every direction, which explode on contact. The images can be destroyed en route, however.
His ninth move, Dragon Cannon: Tabuu summons a giant cannon resembling a dragon that also acts as a hoverbike and blasts a powerful beam of dark energy straight forward.
His tenth move; Bullet Rain. He opens his palm and shoots energy bullets from his fingers.
His eleventh move; Shuriken Boomerang. Tabuu throws out a shuriken that returns after achieving a certain distance.
His twelfth move; Laser Eyes: Tabuu grows so that he can overlook the whole battlefield and starts shooting lasers out of his eyes.
His thirteenth and final/finishing move; Off Waves: He spreads out his wings and emits pulses which deal incredible knockback.