MegaSeadramon

From the Digimon series, MegaSeadramon is an aquatic Digimon. He is the Ultimate form of Betamon.

Evolution

 * Fresh (Baby) - Betamon
 * Baby (In-Training) - Koromon
 * Child (Rookie) - Betamon
 * Adult (Champion) - Seadramon, alternately Airdramon but Airdramon doesn't Digivolve further.
 * Perfect (Ultimate) - MegaSeadramon, corrupted form WaruSeadramon
 * Ultimate (Mega) - MetalSeadramon

Attacks

 * Thunder/Lightning Javelin: Fires numerous electrical streams from his horn.
 * Mega Ice Blast: Shoots a freezing cold blast from his mouth.
 * Ice Storm
 * Maelstrom

Digimon Adventure
One of the Digimon Myotismon brought to the Real World. He was swimming around in Tokyo Bay during August 1 & 2. But on Augest 3rd, MegaSeadramon was given the task of preventing outside interference from the sea. When Joe and T.K. attempted to get into the city, MegaSeadramon attacked them at Rainbow Bridge. When T.K. was in peril, Joe realised it was up to him to save him and his Crest began to glow for the first time. Ikkakumon Digivolved to Zudomon and destroyed MegaSeadramon.

Digimon 02
One of the Digimon under the control of the Dark Spirals, MegaSeadramon trapped the DigiDestined in an offshore oil platform. Cody was able to escape in a submersible and call on Joe for help. As Ikkakumon held MegaSeadramon off, Joe and Whamon freed the kids. Cody then picked up and activated the Digi-Egg of Reliability and Armadillomon became Submarimon. Submarimon and Ikkakumon then worked together to destroy the Dark Spiral controlling MegaSeadramon. Some time later, the DigiDestined called on Ikkakumon to help them protect the sixth Destiny Stone from BlackWarGreymon. Besides the Dolphmon, Ikkakumon called the very same MegaSeadramon to help out too. Despite the combined effort, however, BlackWarGreymon parted the waters, washing the aquatic Digimon away, & destroyed the stone.