Crazy Hand is a refurbished glove that was formerly Motzand in the Banjo Kazooie. He appeared in Super Smash Bros. Melee, Kirby & the Amazing Mirror and Super Smash Bros. Brawl as Master Hand's left hand counterpart in-order to help Master Hand challenge a player. He appears if Master Hand's health is reduced in Classic modes on Super Smash Bros. Melee; On the brawl version, he appears along with Master hand after the player arrives at the final stage in 9 minutes or less with the difficulty level set to Hard, Very Hard or Intense. His moves are erratic and much harder than Master Hand's attacks are.
Crazy Hand also appears in Kirby & the Amazing Mirror in the stage Candy Constellation with the same villian roles as the 2 Super Smash Bros. Games he was in, but it doesn't require anything to battle with the hand
Crazy Hand is recycled from the Banjo Kazooie character "Motzand".