Leviamon Burst Mode is a Demon Lord Digimon whose name and design are derived from the mythological Leviathan. One of the "Seven Great Demon Lords", it represents Mercury and the sin of Envy. It is a Leviamon that has temporarily reached the limits of its abilities through Burst Digivolution. Called the "Devil Beast" out of terror of the exceedingly mighty power that it possesses, it is the strongest monster existing in the Digital World. This extensive monster, said to possess gigantic jaws which could guzzle down even the Digital World, is reported to sleep in the depths of the Net Ocean nearest to the Dark Area, and if it is awakened it will despise any Digimon at the top, and will run not away even from Angel Digimon, much less other Demon Lord Digimon.
- Biting Crush (Rostrum, Lat: Snout): Destroys everything with its gigantic jaws.
- Tail Strike (Cauda, Lat: Tail): Mows everything down with its long tails.
- Bursting Thunder Breath (Anima, Lat: Breath): Fires a giant ball of flame along with a roaring sound to utterly obliterate its target.
- Duo-Tail Strike (Duo Cauda, Lat: Two Tails): Uses its forked tails together to take down the opponent.