Ben Muttski

Ben "Mutt" Muttski is a Mobian dog and assistant to Uncle Chuck. In the old timeline before the Super Genesis Wave, he was instead a Mobini dog who served as Sonic the Hedgehog's pet and loyal companion.

As a Mobini (Pre-Super Genesis Wave)
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)

As a Mobian (Post-Super Genesis Wave)
Muttski was heavily changed due to the reality warping capabilities of the Super Genesis Wave. In this new world, Ben "Mutt" Muttski was a Mobian dog working as an assistant to Uncle Chuck. (StH: #254)

Background Information

 * 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 "speaks" 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's 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.