He has also done voice-over work in numerous Disney productions. He provided the voice of Genie in the Aladdin franchise whenever Robin Williams was unavailable. He also voiced Megavolt in Darkwing Duck, Homer in the Hercules TV series, Go-Go in 101 Dalmatians: The Series, Stewart in Marsupilami, Dunkerque in Lloyd in Space, Mr. Geminini in Kim Possible, Dr. Zibaldo and Prince Rudolf in TaleSpin, the Spirit of the Lamp in Chip 'n Dale Rescue Rangers, various voices in Buzz Lightyear of Star Command, several voices in Wander Over Yonder, Zabar in Dinosaurs, and the Baseball coach in the Goof Troop episode "Take Me Out of the Ball Game". Additionally, he played the cameo narrator in the 1993 Hollywood Pictures film Super Mario Bros. and Judge Markway in the ABC TV show Castle.
- Castellaneta was originally supposed to reprise his role of the Genie from The Return of Jafar and the Aladdin TV show in the second sequel of Aladdin, Aladdin and the King of Thieves. Although he recorded all his lines, when Disney brought back Robin Williams, all recordings made by Castellaneta went unused and new recordings by Williams were used.
- Dan Castellaneta at the Internet Movie Database