Doopliss is a Duplighost that lives in the Creepy Steeple of Twilight Town in Paper Mario: The Thousand-Year Door. He appears as an enemy of Mario several times throughout the game, and is the boss of Chapter 4. He causes the members of Twilight Town to become pigs whenever the bell tolls, and attempts to steal Mario's identity. He has the special ability of stealing another character's body when copying them, something that other Duplighosts are unable to do. He later becomes a member of the Shadow Sirens, replacing Vivian.
Doopliss's English name comes from the word "duplicity," being double or twofold, which references his powers. It also may come from the word "dupe," meaning to fool others, which he does while disguised. In other localizations, his name is Rumpel, which comes from the fairy tale character Rumpelstiltskin, as both offer the same challenge: to have another guess his name.
Doopliss also makes an appearance in the comic Super Mario-Kun. Doopliss plays the same role in Super Mario-Kun as he does in Paper Mario: The Thousand-Year Door. He holds one of the Crystal Stars and steals Mario's identity by using a beam based attack. In the end Doopliss is humorously defeated by the real Mario. After the fight, the real Mario gets his identity back.
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