Mr. O'Bloat is the main antagonist from An American Tail: The Treasure of Manhattan Island. Contents[show] Appearance: The factory's robber baron owners with Mr. Grasping and Mr. Toplofty. Voice by: Richard Karron. Trivia: Gallery: Retrieved from "https://movie-ideas.fandom.com/wiki/Mr._O%27Bloat?oldid=68911" Categories: Protagonists An American Tail An American Tail Characters Hanna-Barbera Characters Villains Antagonists Deceased Characters Characters Males Male characters Mice Universal Characters Richard Karron Heroes Anti-Heroes Sons Bullies Community content is available under CC-BY-SA unless otherwise noted.