Guest Stars Kellen Goff voices Additional Voices John DeMita voices Additional Voices Bill Rogers voices Additional Voices Tony Oliver voices Additional Voices Zeno Robinson voices Additional Voices Imari Williams voices Additional Voices Erika Harlacher voices Additional Voices Joe J. Thomas voices Graham Billy Kametz voices Patrick David Vincent voices Mad Dog Brad Venable voices Ryan Kaiji Tang voices Spacer Xander Mobus voices Mad Dog Bill Butts voices Mad Dog Chris Tergliafera voices Mad Dog Armen Taylor voices Mad Dog Anthony Tai voices Yu En Doug Stone voices Wilson Aleks Le voices Jun See