In 1991, Diskin won the "Outstanding Young Ensemble Cast in a Motion Picture"
Young Artist Award for his role of Sylvester in
Kindergarten Cop. In 1993, Diskin provided the voice of Junior Healy in the USA Network animated series
Problem Child. He would later voice characters in animation, such as Eugene in
Hey Arnold!, Numbuh 1 and Numbuh 2 in
Codename: Kids Next Door,
Eddie Brock and
Venom in
The Spectacular Spider-Man, Hahn in
Avatar: The Last Airbender, and
Ma'alefa'ak in
Young Justice. From 2018 to 2022, Diskin voiced
Gonzo and
Rizzo in the revival series of
Muppet Babies, for which he won the "Outstanding Performer in a Preschool Animated Program"
Daytime Emmy Award in 2019. In anime, notable roles he played include Arashi Fuuma and
Sai in
Naruto and
Naruto: Shippuden respectively, Kai Miyagusuku and Katao in
Blood+, Shoutmon and Cutemon in
Digimon Fusion, Joseph Joestar in ''
JoJo's Bizarre Adventure, Gurio Umino in the Viz Media dub of Sailor Moon, Kensuke Aida in Neon Genesis Evangelion, Char Aznable in Mobile Suit Gundam: The Origin, Death Gun in Sword Art Online, Ban in The Seven Deadly Sins, Satoru Fujinuma in Erased, Knuckle Bine in Hunter x Hunter, and Jack in Beastars. He voiced the Disney character Stitch in the English versions of Stitch! and Stitch & Ai'', taking over from the character's creator and original voice actor
Chris Sanders. In 2018, he voiced Haida in the English dub of the
Netflix original series
Aggretsuko. In video games, he voiced Eric Sparrow in ''
Tony Hawk's Underground and its direct sequel Tony Hawk's Underground 2, young Xehanort in the Kingdom Hearts series, Jared Miller in Halo 4, Jusis Albarea in The Legend of Heroes: Trails of Cold Steel series, Mega Man in Mega Man 11, and Lorenz Gloucester and Caspar von Bergliez in Fire Emblem: Three Houses. In 2018, he voiced Victor in Mr. Love Queen's choice''. He also voiced Khajiit Captain Za'ji in
Elder Scrolls Online. Diskin has also appeared as an actor in
The Wonder Years,
Mr. Saturday Night, On March 10, 2026, Diskin posted on his
Bluesky account that he will not be continuing his work as the voice of Mega Man upon learning that
Capcom declared that the upcoming game
Mega Man: Dual Override would be a non-union project; Diskin cited concerns over
AI protection as his decision for leaving the role; consequently,
SAG-AFTRA issued a "Do Not Work" order to all members in regards to the game. ==Filmography==