Rat King, Adventure Time Wiki

The Rat King is character introduced in "Little Brother." He is, of course, the king of the rats. Kent went on a quest to defeat him by breaking off his teeth to protect Finn and Jake's tree house, and he apparently succeeded. The Rat King is a white rat with a crown. The crown has a single blue gem in it. His tail is pink as well as his eyes, and he possesses long, glowing white teeth that are seen releasing a poisonous green smoke. In the final battle between Kent and the Rat King, the Rat Kin

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