Kirk Thornton is a prolific American voice actor, actor and voice director. His most notable roles in voice work include Gabumon from Digimon Adventure, Jet Link/Cyborg 002 from Cyborg 009, Hajime Sato from Ruroni Kenshin and Shadow the Hedgehog from the Sonic the Hedgehog video game series. He has also voiced several monsters in the Power Rangers series.
Mr. Thornton's career as a voice actor is known for being notoriously difficult to follow, as he likes to use alias names sometimes in the voice credits or leave his name uncredited in certain productions. (Ex. Sparky Allen, Sean Thornton, Sparky Thornton)