The Battle Cattle are a group of cybernetic ruminants created by Doctor Gnucleus. It includes: Flamma-Bull, Minitaur, Oxecutioner, Wrecking Bull , Bisonic, and Sinisteer
Doctor Gnucleus – click to enlarge 
Flamma-Bull (click to enlarge) 
Bisonic 
Wrecking Bull (click to enlarge) 