Ikue Ōtani is the Japanese voice of Chomper.
She also provides the voice of Pikachu and Sawyer on Pokémon. She also provides the Japanese voices for Corsola and Mime Jr. (Pokémon), Grumpella (The Little Engine That Could (1991 short film)), Stephanie Tanner (Full House), George Little (Stuart Little), Dot Warner (Animaniacs), Wendy Goldman (ER), Sailor Tin Nyanko of the Sailor Moon series, Hana-chan (Ojamajo Doremi) and Candy (Smile Pretty Cure)