Mech Bunnies were created by Prof. Sludge in Bunnykill Vol. 3.2. They were incredibly durable and powerful. Infact, they were so powerful that they almost killed Snowball. But he was saved by an enraged Giant Cyborg. The Mech bunnies could take hits from a light blade and not be harmed. The only way they could be destroyed was by destroying the core in it's head.