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MegaSeadramon is a minor antagonist in the anime Digimon and its reboot Digimon Adventure:.


MegaSeadramon is an Ultimate class Digimon that looks like a bigger, and redder version of Seadramon. The top of his head is made of gold, with a horn shaped like a lightning bolt, and green hair.

Digimon Adventure 01

MegaSeadramon first appeared as one of Myotismon's servants that guarded a bridge and blocks Ikkakumon. Ikkakumon fights against MegaSeadramon but the latter was too powerful. Then Joe's Crest of Reliability glowed and Ikkakumon Digivolves to Zudomon to defeat MegaSeadramon knocking it out into the sea.

Digimon Adventure 02

The same MegaSeadramon that worked for Myotismon survived from the fight with Zudomon, returns and is now under the control of the Dark Ring that the Digimon Emperor gave. Ikkakkumon once again fights the controlled MegaSeadramon. Armadillomon Armor-Digivolves to Submarimon to defeat MegaSeadramon, freeing it from the Dark Ring from the Digimon Emperor’s control. Happy, MegaSeadramon returns to the Digital World. It reappears again with several Dolphmon to fight BlackWarGreymon, but it was easily wiped out by him.

‘’Digimon Adventure: (2020)’’

While the Digidestined along with Leomon, Falcomon, and Spadamon were on the next journey in the Digital World, a MegaSeadramon appears along with WaruSeadramon, and attacks them. It tries to devour Taichi and Greymon, but manage to fight it back underwater by biting and clawing it, and riding on it. Yamato, Garurumon, Leomon, Falcomon, and Spadamon then put up a brutal fight against MegaSeadramon, knocking it out, but still continues to fight them. Then, suddenly, Sora, Mimi, Izzy, and Joe, along with their Digimon partners returned to the Digital World to save Taichi and Greymon. MegaKabuterimon manages to knock out MegaSeadramon, but it and WaruSeadramon try to wipe everyone out with a combine water cyclone attack, but Garudamon finally destroys them both with her Wing Blade attack.


A Seadramon that evolved systematically, he is body has become larger. He is mainly witnessed under severe environment around the Folder continent. The outer hull around his head has become harder, a blade has grown on his head, his defensive power has increased, and he is able to shoot electricity from the blade on his head. He has become more intelligent and is able to swim faster; he dives into the deep and murders his prey.


  • Thunder Javelin
  • Mail Strome (Maelstrom in Japanese version)
  • Doramon Attack (Dramon Attack in Japanese version)
  • Ice Blast (Ice Arrow in Japanese version)
  • Tail Blade (Stinger Surprise in Japanese version)
  • Ice Reflector (Ice Reflect in Japanese version)
  • Thunder Blade
  • Mega Ice Blast
  • Squeeze



  • MegaSeadramon's mega form is MetalSeadramon.
  • MegaSeadramon's champion form is Seadramon.
  • In the English version he was voiced by Dave Guerrie, who also voiced Phantomon and Machinedramon.
  • It is possible that this MegaSeadramon was the Seadramon fought in the lake by the Digidestined, later digivolved and then recruited in Myotismon's army.
  • However, a similar theory which thinks MetalSeadramon was this megaevolved MegaSeadramon is completely impossibile, because the Dark Master was in his Mega form since ancient times where he also fought with original digidestined, and also because MetalSeadramon was conquering Digiworld when MegaSeadramon was in Real World with Myotismon. 
  • The scene in the bridge of Odaiba where MegaSeadramon is defeated by Zudomon with his hammer is partially inspired by the norse mythological battle of the titanic sea serpent Jormungand against the god Thor, where he also kills the serpent with his thunder hammer. 
  • MegaSeadramon is the only surviving of Myotismon's army, except Gatomon revealed being a digimon of DigiDestined (Kari) and Nanimon with his recruits who escaped before Myotismon was going in the Real World.
  • He's also the only one that becomes good and still be alive, if excluding Gatomon that was already destined to be with Kari.  


          Digimon Logo.png Villains

Digimon Adventure
Main Antagonists: Devimon | Etemon | DemiDevimon | Myotismon | Apocalymon | Diaboromon | Digimon Emperor | Kimeramon | Arukenimon | Mummymon | BlackWarGreymon | Daemon | Yukio Oikawa
Dark Masters: MetalSeadramon | Puppetmon | Machinedramon | Piedmon
Dark Masters’ Army: Scorpiomon | Divermon | Kiwimon | Cherrymon | Garbagemon | WaruMonzaemon | LadyDevimon
Myotismon’s Army: Bakemon | Devidramon | Dokugumon | Mammothmon | Gesomon | Raremon | SkullMeramon | DarkTyrannomon | MegaSeadramon | Gizamon | Phantomon | Snimon | Tuskmon
Daemon Corps: LadyDevimon | MarineDevimon | SkullSatamon
Other: Kuwagamon | Shellmon | Seadramon | Unimon | Ogremon | Evil Greymon | SkullGreymon | Kokatorimon | Vademon | Scorpiomon | MetalGreymon | Infected Imperialdramon
Digimon Tamers
Main Antagonists: Hypnos | Mitsuo Yamaki | Beelzemon | Zhuqiaomon | ADR-01: Jeri Type | D-Reaper
Devas: Mihiramon | Sandiramon | Sinduramon | Pajiramon | Vajramon | Indramon | Kumbhiramon | Vikaralamon | Makuramon | Majiramon | Caturamon
Bio-Emerged Digimon: Goblimon | Gorillamon | Vilemon | Allomon | Dokugumon | Devidramon | IceDevimon | Musyamon | Harpymon
Other Enemies: Orochimon | Megidramon
Digimon Frontier
Main Antagonists: Cherubimon | Dynasmon | Crusadermon | Lucemon
Evil Hybrids: Grumblemon | Ranamon | Petaldramon | Mercurymon | Duskmon
Cherubimon’s Army: Cerberumon | Snimon | Goblimon | ShadowToyAgumon | Golemon | Volcamon | Beetlemon's Shadow | Karatenmon | Asuramon | IceLeomon | Phantomon | IceDevimon | SkullSatamon
Digimon Data Squad
Main Antagonists: Gotsumon | Merukimon | SaberLeomon | Akihiro Kurata | Gizumon | Belphemon | King Drasil
Bio-Hybrids: Kouki Tsubasa | Nanami | Ivan
Royal Knights: Gallantmon | Crusadermon | Leopardmon | Craniamon
Other: Kokatorimon | Drimogemon | Keramon | Neon Hanamura | Soulmon | Vilemon | DemiDevimon | Dokugumon | MetalPhantomon | Okuwamon | Hagurumon
Digimon Fusion
Main Antagonists: Lord Bagra | AxeKnightmon | Tyutyumon | Laylamon | Tactimon | Blastmon | Quartzmon
Bagra Army: MadLeomon | Orochimon | Neptunemon | Octomon | AncientVolcanomon | SkullMeramon | RedMeramons | IceDevimon | Daipenmon | SkullScorpiomon | Ebemon | Lucemon | Musyamon | Matadormon | Brakedramon | Mantaraymon
Dark Generals: Dorbickmon | NeoMyotismon | Lord Zamielmon | Splashmon | Olegmon | Gravimon | Apollomon Whispered
Other: GranLocomon | Huanglongmon | LadyDevimon | Honeybeemon | GrandisKuwagamon
DigiQuartz: MetalTyrannomon | Sagomon | Ogremon | Fugamon | Harpymon | Volcdramon | Dragomon | Sakkakumon | MetallifeKuwagamon | Diaboromon | Myotismon
Digimon Universe: Appli Monsters
Main Antagonists: Leviathan | Yūjin Ōzora | L-Corp
Leviathan’s Servants: Cameramon | Sakusimon | Mienumon | Sateramon | Knight Unryuji | Ultimate 4 | Deusmon
Others: Cometmon | Drawmon | Tubumon | Uratekumon
Digimon Adventure: (2020 Series)
Main Antagonists: Negamon | Devimon | Millenniummon
Negamon’s Minions: Argomon | Eyesmon/Orochimon | Soundbirdmon
Devimon’s Minions: Ogremon | Coredramon | MetalTyrannomon | Calmaramon | Velgemon | SkullKnightmon | DarkMaildramon
Millenniummon’s Minions: Vademon | Sakkakumon
Dark Digimon: SkullScorpiomon | Cannonbeemon | Kuwagamon | Splashmon | Megadramon | Parrotmon | Mephistomon | Machinedramon | Gryphonmon | Burpmon
Other: Gesomon | WaruSeadramon | Tankdramon | Fangmon | Cerberumon | BladeKuwagamon | MetallifeKuwagamon | Oppossummon | Tropiamon | Entmon | Parasimon | Boltmon | Zanbamon | SkullBaluchimon

Parrotmon | Kokomon | Mephistomon | Parasimon | Ornismon | Murmukusmon | Argomon | Alphamon | Dark Gennai | Maki Himekawa | Meicoomon | King Drasil | Eosmon | Menoa Bellucci

Video Games
Analogman | Chaos Lord | Crimson | OverLord GAIA | A.o.A. | Lord Megadeath | Galacticmon | Alphamon | Chronomon DM | Jammingmon | Virus Rebootmon | Eaters | Arcadiamon | Yu Nogi

Neo Saiba | Barbamon | MachLeomon | Weddinmon | Shademon