Danny Mann was the voice of a Sharptooth (Allosaurus). He also voiced a Parasaurolophus hatchling named Tasha in Land of the Lost.
He has done roles in such shows as:
- Galaxy High - the Creep
- Crash Tag Team Racing - Ebenezer Von Clutch
- Camp Candy - Chester
- Danny Phantom - Amorpho
- Darkwing Duck - J. Gander Hooter
- Ducktales - Backwoods Beagle
- Family Dog - Family Dog
- Back to the Future: The Animated Series - Einstein the dog
- Batman: The Animated Series - Radio D.J
- Little Dracula - No Eyes and Twin-Beaks
- Popples (TV series) - Punkster and Putter
- Space Goofs - Gorgeous
- TaleSpin - Airplane Mechanic, Guard, High Marshall's Aide, Louie's Assistant, Manure Salesman, Policeman, Raccoon Crook #2, and Talk Show Announcer
- The Tick - Dinosaur Neil, Dr. Mung Mung, Mr. Exciting, and Tongue Tongue
- Time Squad - Albert Einstein and Harry Houdini
- Hard Time on Planet Earth - Control
- Heathcliff and the Catillac Cats - Hector and the Fish Market Proprietor
He has also done roles in several animated or live-action films such as:
- Happy Feet Two (2011) - Brokebeak
- Happy Feet (2006) - Dino and Zoo Penguin
- Open Season (film) (2006) - Serge
- Looney Tunes: Back in Action (2003)- Robo Dog and Spy Car
- Cats and Dogs (2001) - Ninja Cat
- Rayman: The Animated Series (1999) - Sir Rigatoni, LacMac
- The Land Before Time VI: The Secret of Saurus Rock (1998) - Allosaurus
- Babe: Pig in the City (1998) - Ferdinand
- Babe (1995) - Ferdinand
- Balto (film) (1995) - Kaltag
- Pocahontas (1995) - Percy
- Thumbelina (1994) - Mozo
- FernGully: The Last Rainforest (1992) - Ash/Voice Dispatch
- Rover Dangerfield (1991) - Wolf
- Little Nemo: Adventures in Slumberland (1992) - Icarus the flying squirrel