GigaSeadramon

GigaSeadramon is a Cyborg Digimon, the digivolved form of MegaSeadramon X. A Digimon also known as the "Gigantic Assault Landing Ship". Its even larger than a Whamon and is capable of transporting several Digimon inside itself.

Digimon D-Cyber
A GigaSeadramon was furious with the children when the Greymon X of Teru destroyed MegaSeadramon X (his brother). 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/Dusk
GigaSeadramon is obtainable through DNA-Digivolution of Whamon and Gigadramon. Whamon must be at least Level 53 with Machine and Aquan at minimum 17,000 EXP each. You can also get him by DNA-Digivolution of Tylomon and Kenkimon. It can also digivolve from MegaSeadramon, but you must have already gotten GigaSeadramon to do so.

Attacks  Variations/Subspecies 
 * Giga Sea Destroyer: Launches a strong energy torpedo from its mouth.
 * Sky Wave: Rain falls from the sky at fast speeds flooding its enemies.
 * MetalSeadramon