Akame Doggler

Akame Doggler (アカメドグラー): A crab monster used by Oyobu to oversee an Underground Center, part of a 50-year project by Zeba where humans are brought underground as infants and forced to mine mushrooms that the Unglers need to survive. When Akira ends up there, he helps Mirai and his sister Yui escape to the surface. After being blasted to bits by the Shot Bomber, this monster was enlarged and destroyed by Great Five.