Crazy Hand (クレイジーハンド, Crazy Hand) is Master Hand's left hand counterpart first appearing in Super Smash Bros. Melee. While Master Hand's movements are very smooth and calm, Crazy Hand moves in erratic ways. He is fought in Melee when Classic Mode is cleared on Normal difficulty or higher in 5 minutes and 50 seconds or less, after Master Hand's health is reduced by half. He also appears in Event 50: Final Destination Match.
Crazy Hand's basic appearance is exactly the same as Master Hand's (apart from being a left hand), but he is more chaotic in general, befitting his impulsive and destructive nature. When preparing for an attack, Crazy Hand's movements are also different. When joined with Master Hand, they can perform several cooperative attacks. He, like his counterpart, is always fought on a version of Final Destination.
In Brawl, Crazy Hand reprises his role at the end of Classic Mode. To fight him, the player must arrive at the final stage in 9 minutes or less with the difficulty level set to Hard or higher. He also appears as one of the many bosses in Boss Battles Mode, where this is the only time Crazy Hand is fought separately from Master Hand and can be faced without any special conditions.
Unlike every other boss in Brawl, Crazy Hand does not appear at all in The Subspace Emissary (unlike Master Hand, who appears prominently but is not fought). Despite this, his trophy, when arranging the collection by series, is listed in the "The Subspace Emissary" section. Crazy Hand is the only boss that does not have to be fought in order to unlock Boss Battles, and is the only boss in the mode to not make an appearance in the SSE.
In Super Smash Bros. for Nintendo 3DS's Classic Mode, to fight Crazy Hand the player must reach the final branch while the difficulty is set to 3.0 Intensity or higher, and then choose the black path.
Crazy Hand cannot be fought in Classic Mode on the two easiest difficulties. You will also need to complete the three hardest difficulties in 9 minutes or less (except the hand battle) without continues.
Smash 4 trophy
While Crazy Hand as a character is unique to the Smash series, his attacks (as well as Master Hand's) are very similar to Wham Bam Rock's attacks in Kirby Super Star. Wham Bam Rock performs a move that involves putting its hand over the player and making rocks fall. Crazy Hand does a move that is very similar, except that Crazy Hand's rocks explode with darkness. Both Wham Bam Rock and Master and Crazy Hand perform a move that involves "walking" across the stage to flick the player. They both will also try to grab on to the player and cause damage. 
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