Plesiomon

Plesookumon (also romanized Precookumon) is a fictional character from the Digimon franchise, a Mega Level Long Neck Dragon Digimon that is named after Plesiosaurus.

Evolution
Plesiomon's Digivolution line according to the D-Terminal :
 * Fresh (Baby I) - Potomon
 * In-Training (Baby) - Bukuimon
 * Rookie (Child) - Gomalimon
 * Champion (Adult) - Akakramon
 * Ultimate (Perfect) - Zudoxximon
 * Mega (Ultimate) - Plesookumon

Abilities
Despite being an aquatic Digimon it can fly.

Attacks

 * Sorrow Blue: A soundwave attack.
 * Shaking Pulse: Makes a short earthquake.
 * Water Tail Blaster: Fires a water jet from his tail.
 * Sand Water Blast: Spews out sand water from his mouth.

Digimon Tamers
A Plesookumon was among the Mega Level Digimon that appeared to help the Sovereign fight the D-Reaper.

Digimon World 2
Plesookumon is called Precookumon and evolves from Zudoxximon.

Digimon World DS
Plesookumon evolves from Whaloomon.