Shake King

The Shake King is a pirate first appearing in the game Wario Land: Shake It!. The Shake King and his pirate gang, whereunder Bandineros attempted to take over the Shake Dimension. In order to do so, they attacked the Shake Dimension and imprisoned its ruler, Queen Merelda, and her loyal subjects (the Merfles), on their ship. The greedy pirates stole the Shake Dimension's treasure as well (known as the Bottomless Coin Sack, which could spit out an endless amount of coins every time it was shaken). However, one Merfle managed to escape from the pirate ship and got into Wario's world, to seek help in liberating the Shake Dimension from the Shake King's takeover (which Wario agrees toward, but mainly for the Bottomless Coin Sack itself). If Wario collected all of the Boss icons, Wario could locate the Shake King's ship where the final confrontation awaits against the Shake King himself.

In normal levels, if the timer reached zero, the Shake King will grab Wario, take all of his collected stuff away, throw him back to the checkpoint or farther away from it.

Trivia

 * The Shake King bears a strong resemblance to Booster.