|Title||Gigantic Assault Landing Ship|
|Prior forms||MegaSeadramon X|
|Cards||(Ja:) Sx-26, Sx-60, Bx-22, Dα-546|
GigaSeadramon is an Android Digimon and a carrier of the X Antibody. As a successful elaboration on MetalSeadramon, it demonstrates the fastest speed of movement and strongest ability for interception under the sea. In order to further expand its sphere of influence, the Crack Team constructed this massive Digimon in absolute secrecy and endowed it with the ability to control the sea and possession of a cruising range which covers the vast Net Ocean. Its overall length exceeds even that of Whamon, and since Digimon belonging to the Crack Team, such as Chaosdromon, can be loaded in its interior, it is no longer a lone Digimon, and it seems possible to say that it is an assault landing ship for which it isn't known when and where it will appear on the Net Ocean, or when it will launch an attack.
- Giga Sea Destroyer: Fires an energy torpedo from its mouth-cannon.
- Sky Wave: Strafes with countless anti-aircraft energy shells fired from the launchers on its back.
- GigaSeadramon (ギガシードラモン)
Official romanization given by the Digimon Reference Book and used in the franchise.
A GigaSeadramon was furious with the children when the Greymon X of Teru destroyed his brother, a MegaSeadramon X. He appeared soon after MegaSeadramon X was defeated. GigaSeadramon attacked Hikaru and Teru which made Dorimon evolve to Grademon and defeat him.
Digimon World DS
GigaSeadramon digivolves from MegaSeadramon. It can also be found in Undersea Drive. The B.T. Boss was going to use a GigaSeadramon to fight the main tamer, but it was beaten by a MarineAngemon.
Digimon World Dawn and Dusk
GigaSeadramon is #303, and is a Mega-level, Attacker-class, Aquan-species Digimon with a resistance to the Water element and weakness to the Light element. Its basic stats are 340 HP, 355 MP, 188 Attack, 170 Defense, 125 Spirit, 120 Speed, and 75 Aptitude. It possesses the Heroic Power, Heroic Guard, All Elements, and Critical 4 traits.
GigaSeadramon digivolves from MegaSeadramon. In order to digivolve to GigaSeadramon, your Digimon must be at least level 59, with 25,000 Aquan experience, but only if you've previously befriended a GigaSeadramon.
Digimon Story: Lost Evolution
GigaSeadramon is #204, and is a Mega-level, Attacker-class, Dragon-species Digimon with a resistance to the Water and Thunder elements and a weakness to the Fire element. It possesses the Poison Barrier, Health 200%, Skill Master, and Stun Barrier traits, and has the special skill Dive.
It dwells in the Angler Tunnel. When defeated, it can drop the debug plate for MegaSeadramon or GigaSeadramon.
GigaSeadramon digivolves from Magnamon and MegaSeadramon. In order to digivolve into GigaSeadramon, your Digimon must be at least level 44 with 170 defense and a level cap of 66, but only once you have revived GigaSeadramon.
It can be hatched from the High Drago DigiEgg.