From the Super Mario Wiki
Queen Merelda is a supporting character in the game Wario Land: Shake It! She is the queen of the Shake Dimension. Her name is an anagram of "emerald" and a play on the Spanish and Portuguese word esmeralda, which means "emerald".
Merelda and her loyal subjects, the Merfles, were imprisoned by the evil Shake King and his pirate gang (who attempted to take over the locale and also stole the Shake Dimension's treasure, the Bottomless Coin Sack). However, one of Merelda's Merfles managed to escape into Wario's world, requesting help to rescue Merelda and the Shake Dimension from the Shake King's evil grip. After Wario rescues her, she walks up to thank him for his actions, only to be grabbed and tossed aside as Wario goes for the Bottomless Coin Sack instead.
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