Master Hand (マスターハンド, Master Hand) is a hand-like entity who acts as the main recurring boss in the Super Smash Bros. universe. He appears at Final Destination as the final boss of the 1P Game in Super Smash Bros. and of Classic Mode in Super Smash Bros. Melee, Super Smash Bros. Brawl, and Super Smash Bros. 4. The player must defeat him by bringing his HP down to 0. Master Hand's left hand counterpart, Crazy Hand, was introduced in Melee.
Despite appearing in all four games of the series, considerable mystery surrounds the character, due to a lack of sufficient official explanations. However, he is known as the creator of the Super Smash Bros. universe, and in Brawl as the master of the World of Trophies. His trophy info in Brawl implies that he does not use his full power against the smashers, and merely toys with them for his own enjoyment. As seen in Super Smash Bros 4, it is possible that his true power is actually Master Core, however, there is little to no information about the relation between the two.
He is only playable in the games through hacking, though in Melee he is also playable via a glitch.
He is also seen in the opening movie. He places plush dolls of two characters on a table and positions objects around them. After counting down from three, he snaps his fingers, transforming the objects and table into a stage resembling Peach's Castle, and bringing both of the plush dolls to life.
Super Smash Bros. Melee sees Master Hand reprising his role as a boss in Classic Mode. He is fought in the final battle on Final Destination. Defeating Master Hand once again causes the screen to fade to white as he explodes into the background.
Master Hand received a multitude of alterations to his overall fighting style in Melee. He faces only one direction, and his HP and power change with the difficulty. The highest levels of difficulty give him attacks with OHKO potential. Aesthetically, he no longer has a cuff, instead having a wrist that fades into nothingness.
The game also introduced Crazy Hand, Master Hand's left-handed partner. When the two are on the field at the same time, they can perform powerful combination attacks. Crazy Hand appears when set conditions are met. The duo also appear in Event 50: Final Destination Match as boss characters.
Master Hand reprises his role as the final boss of Classic Mode in Super Smash Bros. Brawl, and once again is fought on Final Destination. His attacks are very similar to that of his Melee form with some changes. The amount of HP he has is still dependent on the set difficulty. Crazy Hand also returns in Classic Mode if certain conditions are met.
Master Hand also appears in The Subspace Emissary, as the one giving orders to Ganondorf, Bowser and Wario. Soon after a Subspace Bomb is used on King Dedede's castle, Ganondorf receives new orders from Master Hand via a video screen.
However, when all of the characters arrive in Subspace, Ganondorf reports to Master Hand after betraying Bowser. When Master Hand reveals himself, however, Ganondorf sees that he has actually been under the control of a powerful being called Tabuu. Tabuu had enslaved Master Hand using chains of light knowing that he could control and use him for recruiting fighters to aid him in his goals.
Ganondorf defiantly attempts to attack Tabuu but is easily knocked back, though his fall breaks the chains of light that Tabuu used to control Master Hand with, thus freeing him. Master Hand subsequently falls into the ground, bleeding from where he was enchained. Master Hand too attempts to strike Tabuu but is beaten with little effort, collapsing once again into the ground and lying motionless in defeat.
Master Hand is once again the final boss of Classic Mode in Super Smash Bros. 4. At higher intensities he is fought along with Crazy Hand, and after taking a certain amount of damage, he writhes about in the air before releasing a dark mass named Master Core. In Super Smash Bros. for Wii U, he stars in his own mode named Master Orders.
Unlike the previous games, Master Hand and Crazy Hand share a HP meter. Each of them have new attacks they perform both individually and in conjunction with each other, such as the two tossing energy balls to one another and Crazy Hand opening a rift that sucks in characters that get caught inside.
Master Hand appears in the Game Boy Advance game Kirby and the Amazing Mirror as a mini-boss. Vacuuming him up will give Kirby the Smash ability, an ability that gives Kirby some of his moves from Super Smash Bros. Melee (though in a slightly altered state). Master Hand and Crazy Hand are also the bosses of the Candy Constellation stage.
In Kirby Squeak Squad, an enemy that resembles Master Hand appears on some levels, but it is made up of black particles similar to the Master Core.
Although he is original to the Super Smash Bros. series, some of Master Hand's attacks are very similar to those of Wham Bam Rock in Kirby Super Star (Kirby's Fun Pak in the PAL regions).
Wham Bam Rock attacks using its hand, which is made of rocks. Wham Bam Rock and Master Hand share a move where they point their index finger at the player like a gun; however, Wham Bam Rock proceeds to make rocks fall, while Master Hand shoots out bullets. Both Wham Bam Rock and Master Hand perform a move that involves "walking" across the stage to flick the player. Both will also try to grab on to the player and crush them.
In Melee, the Master Hand glitch, a particular application of the Name Entry glitch, allows a player to control Master Hand. Aside from this, the only other methods of controlling Master Hand are by hacking with a cheating device such as GameShark or Action Replay. Several rumors exist of being able to control Master Hand in other games, particularly the original Super Smash Bros., all currently are false.