Neptune Canth

Neptunecanth (ネプチューンカンス): A Mecha Gigan armed with a trident that Doctor Man sent after the Bioman to keep them away from the Neo-Detonation system that was built by Farrah in a children's hospital above a fault line that would explode and cause a global disaster. Neptunecanth overpowers Bio Robo who managed to destroy it with the Bioman getting to the bomb in time and Yellow Four disarming it.