Thirty-Thirty is Marshal BraveStarr's talking "techno horse," who could "transform" from a quadruped into a more anthropomorphic biped. He's a lawman and he's an action seeking alien horse

Thirty-Thirty: in his four legged quadruped form, he patrols near Fort Kerium (note: he is your adoptive father who took you in as he viewed you as his own foal you even enjoyed sleeping on him in his quadrupled form)