Grubba is a major character in Paper Mario: The Thousand-Year Door who, in his younger years, was a champion wrestler and martial artist. Though initially impartial to fame and riches, after becoming rich and famous he fell in love with the good life. After retiring as a fighter, he became the promoter of the Glitz Pit in Glitzville. When he introduced himself to Mario, he claimed to be past his prime, unable to fight in the ring anymore. Bandy Andy claimed that Grubba was over sixty years old during the events of the video game. While initially presented as an uninvolved third party to Mario's fight against the X-Nauts for the Crystal Stars, when Mario discovered his unethical use of the Gold Star, Grubba became an antagonist, wishing to keep his secrets safe. Behind his benevolent, boisterous facade he is dangerously self-centered, viewing situations in terms of benefits and dangers to himself and his lifestyle rather than the moral implications of his actions.