Octomon

Octomon is a Champion Level Mollusk Digimon that resembles an octopus. It is the Digivolved form of Syakomon.

Evolution

 * Fresh (Baby) - Pitimon
 * Baby (In-Training) - Bukamon
 * Child (Rookie) - Syakomon
 * Adult (Champion) - Octomon

Special evolution

 * DNA Digivolution (Ultimate) - Octomon + Coelamon = Dragomon
 * DNA Digivolution (Ultimate) - Octomon + Dolphmon = Scorpiomon

Attacks

 * Spurting Ink Strike (Ocean Ink Gun): Shoots ink out of it's gun.
 * Insincerity 
 * Octopus Trap: Traps his enemys with his tentacles.

Digimon 02
The Syakomon belonging to the Poi Brothers, the DigiDestined of Hong Kong, Digivolved to Octomon to fight a Mojyamon. They knocked him to the ground before Kari and Izzy arrived with Angewomon and MegaKabuterimon and Gennai's Chinese counterpart Jackie who told them that the Mojyamon wasn't evil. One of the Octomon was used to help the army at the India/Chinese border know in ink writing that the Digimon came in peace.

Digimon Tamers
2 Octomon were among the Digimon seen through the rip in the sky during Vikaralamon's rampage.

V-Tamer
Octomon was one of Lord Marine's henchmen and was destroyed by Zeromaru.