Plesiodramon is the third armor form of FrostBetamon through the Digi Egg of Willpower. His name is derived from "Plesiosaurus" and "Dramon". The Crest of Willpower is located on his head. He is FrostBetamon's most powerful armor form.
He has the appearance of a aquatic dinosaur with blue armor on his head, body and tail. He has four fins and his skin colour is white.
Pulse Blast: Fires a shockwave from his mouth at the opponent.