In 1992, Mann voiced Dog on Fievel's American Tails. The cartoon also included Dan Castellaneta as Chula, Cathy Cavadini as Tanya Mousekewitz and Hal Rayle as Clint Mousewood. He also voiced Icarus in the English Dub of Little Nemo: Adventures in Slumberland, which included Mickey Rooney as Flip. In 1993, Mann, Cavadini, Rayle along with Troy Davidson and Thomas F. Wilson did additional voice work for The Pink Panther. Mann later performed voice work on the Hey Arnold episode Veteran's Day, along with regular VA Castellaneta.
In 2005, Mann, along with David Kaufman and James Arnold Taylor did voice work for the video game Ultimate Spider-Man. In 2006, Mann voiced Dino and a zoo penguin in Happy Feet, which included Elijah Wood as Mumble. In 2007, Mann and Joshua Keaton provided additional voice work for Spider-Man 3: The Game which also had Neil Ross voicing Luke Carlyle.
In 2011, Mann voiced Brokebeak in Happy Feet Two, which included Wood reprising his role as Mumble and Cavadini doing additional voice work. He voiced Hewdraw & Thanatos in Nintendo's 2012 game Kid Icarus: Uprising.