Prince Mush

Prince Mush is the first champion of the Glitz Pit. He is mentioned by several characters throughout Chapter 3 of Paper Mario: The Thousand-Year Door and appears at the end of it. Prince Mush was captured and had his power drained by Grubba's power-draining machine after he found out that Grubba was using a Crystal Star to drain fighters' powers. As such, Mush was missing for an extended amount of time. Afterward his older sister Jolene went undercover in the Glitz Pit to look for him, and after accidentally seeing Grubba power up by using his machine, she carefully guided Mario to defeat Grubba. After Grubba's defeat, Grubba claimed to suck the life out of Mush with his machine to benefit himself, saddening Jolene. Subsequently, Mush appears out of the Gold Star, which powered Grubba's machine. Now united with his sister Jolene, they rejoice.

Later in Mario's adventure, he gets an e-mail from Jolene saying that Prince Mush was planning on making a comeback. He is also the answer to a question of the X-Naut Fortress Thwomp, which asks who is the first champion of Glitzville.

Trivia

 * Prince Mush's real name is simply Mush in the English version.