Slash Beast is a minor antagonist from Megaman X4. He is a Reploid and a member of the military faction Repliforce as one of their officers, ordered to guard a military train of supplies.

His appearance is humanoid and robot with traits modeled after a lion especially the orange mane of spiked hair, muzzle and claws. His armor is sleek with various brown and golden colors and some pointed sections of it. Over his left eye he wears an eyepatch.

Given the animal he is modeled after, he is nimble in combat and relies more on his razor claws to tear. He can also unleashe dual crescent waves of energy from his claws using Twin Slasher.