Uncle Chuck's Apprentice
One of many young refugees who fled Mobotropolis with Chuck and Rosie Woodchuck when Dr. Eggman came to power, Muttski later became Chuck's reserach assistance. Sonic and Tails met him when they arrived in the Wood Zone to see Antoine D'Coolette, and were greatly surprised by the change in their old friend-their memories of the previous reality were of him as a Mobini. Muttski and Chuck later fell victim to one of the tremors they were investigating, falling into a deep chasm. Fortunately, the trio of Freedom Fighters came to their aid, Antoine impressing Muttski in particular by chopping through several falling logs with his sword. Collecting their remaining samples of the strange energy they had found emerging from within Mobius, Mutt and Chuck departed for Spagonia to do further research. Unfortunately, Muttski was soon forced to contact the Knothole Freedom Fighters with horrible news: Chuck and Professor Pickle had been abducted by Eggman's forces. (StH: #254, #257; SSD: #8)
After Dr. Ivo Robotnik had launched a successful coup and began consolidating his power, Muttski and Chuck were captured and Roboticized during Charles' time running a Chili Dog Stand. Muttski remained an emotionless automaton until his liberation following Robotnik's death at Sonic's hands, and later Deroboticized by the Bem, coming to live with Sonic and Uncle Chuck, as well as Jules and Bernie, in Knothole. Muttski's bond with Sonic strengthened following his return from space, where, courtesy of the alien implant Sonic had installed to be able to translate alien languages, Muttski's normal inaudible woofs were translated into proper speech, allowing Sonic to communicate with him and understand responses. Following the destruction of Knothole, Muttski continued to reside in New Mobotropolis with Sonic's family, right up until the Super Genesis Wave changed the world. (StH: #43, #50, #123, #134, #175, #247)
Muttski is a dedicated apprentice to Uncle Chuck, and a firm friend of the Freedom Fighters. He is obviously very close to his mentor, and was distraught when Chuck was taken captive.
Muttski is Sonic's devoted pet and close friend, and is very much attached to the rest of the Hedgehog family. He was also quick to befriend Tails, and was apologetic upon learning that he had scared Tails while playing a game with him.
Muttski is a yellow-furred Mobian Dog with brown spots on his back and over his left eye, brown-tipped left ear and tail, and what appear to be either brown lower legs and feet or brown socks. He has blue eyes and sandals, and wears white gloves and a red bandanna around his neck.
- Muttski is one of several characters to originate from the SatAM cartoon show, where he appeared only in the pilot episode in his Roboticized form.
- When Muttski "spoke" while still a Mobini, he is shown to speak in third-person like: "Muttski is happy to have you home again." instead of "I'm happy to have you home again."
- It has been speculated that Muttski's post-Super Genesis Wave birth name is in tribute to the late Ben Hurst, the main writer of the Sonic SatAM cartoon series, of which Muttski originated.