Monster is one of the Big Three, as strong as a whale and less than half as smart. Likes to work with the monster Zyuoh a lot. Initially armed with a huge axe, later upgraded and armed with Monster Big Iron (morning star), Monster Big Cutter (hand sword), and Monster Big Hand (giant iron hand). He was killed after receiving damage when Super Megas was destroyed while finding Balzion. In the English dubbed version of the show his name is changed to Vargo, making him the only big three member to have his name changed in the English dubbed.