This character exists primarily within the Sonic Boom continuity.
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
Mike the Ox is a character that appears in the Sonic Boom television series. He is an anthropomorphic ox and Mike the Ox's counterpart from an alternate dimension where Sonic never existed. He is also a member of the Rebellion.
Mike is essentially a doppelganger of his Sonic Boom World counterpart and is so identical to him in both anatomy and attire.
At some point, Mike joined the Rebellion, a resistance group that opposed Lord Eggman's rule over Seaside Island.
During one evening, Mike would help out around the Rebellion's camp while Amy showed Sonic around.