Thrax (Secret of Evermore)
From Multiversal Omnipedia
Thrax was a gargantuan skeletal insect with the power to call acid rain and command other insects. Thrax reigned over the tarfields of the Bugmuck and terrorized the surrounding desert from the citadel-husk of a mind-blowingly large insect's corpse, until defeated by a boy and his dog from the town of Podunk on Earth.