The cast of Stretch Armstrong and the Flex Fighters (main characters only) ;
--Scott Menville (Jake Armstrong / Stretch)
Scott David Menville (born February 12, 1971) is an American actor and musician who is known for his voice work in animated films, television series and video games. He voices Robin in Cartoon Network's Teen Titans (2003–2006) and Teen Titans Go! (2013–present). Menville is the son of animator and television writer Chuck Menville (1940–1992).
His first role came in 1979 in an episode of Scooby-Doo and Scrappy-Doo. He is perhaps best known for providing the voice of Robin on Teen Titans, Lloyd Irving on Tales of Symphonia, taking over the role of Freddy Flintstone from Lennie Weinrib on The Flintstone Kids, and Ma-Ti on Captain Planet and the Planeteers.
He also voiced Jonny Quest on The New Adventures of Jonny Quest, Quicksilver on The Super Hero Squad Show, Red Herring on A Pup Named Scooby-Doo, and Kevin French on Mission Hill.
Menville is also a musician. He was the bassist for the Southern California rock band Boy Hits Car, which released three albums before he left the band in 2006; he had been a founding member of the band. Menville has also participated in non-voice acting roles. He appeared in Ernest Goes to Camp as Crutchfield and had recurring roles on Full House as Kimmy Gibbler's boyfriend Duane, and on The Wonder Years as Wayne's best friend Wart.
He did the voices of Metamorpho in Batman: The Brave and the Bold, JT and Jimmy Jones on Ben 10, and reprised his role as Robin in Teen Titans Go!.
In 2016, he played Arthur, the Goodwin twins' computer in the television series Second Chance and Sneezy in the Disney XD animated series The 7D. Later that same year, he also reprised his role as Duane on Fuller House. In 2023, he played the role of Declan on Oddballs.
--Ogie Banks (Ricardo Perez / Omni-Mass)
Ogie Banks (born June 13, 1973) is an American voice actor. He is best known for his roles as Clawd Wolf in Monster High, and Luke Cage and Miles Morales in Ultimate Spider-Man. He also voices Dylan in the Bratz franchise and Omoi in Naruto.
--Steven Yeun (Nathan Park / Wingspan)
Yeun Sang-Yeop, known professionally as Steven Yeun, is an American actor. Yeun initially rose to prominence for playing Glenn Rhee in the television series The Walking Dead. He earned critical acclaim for starring in the thriller Burning and drama Minari.