Crushto was first seen on planet Mukow. Crushto had a large amount of, what could be called, invincibility periods where weapons did not damage him at all. Such periods were when he first landed on the arena or when he was switching attacks. Crushto was a creature native to the oceans of Praxus Seven, found by fishermen with his fins missing and was given cyborg arms and legs, as stated by Qwark while Ratchet fights him, Captain Qwark also stated that Crushto was a fan of sushi and official endorsed Neo-Fit Ice Water.