King Poseidon
King Poseidon was a Decepticon from Generation 1 series, Masterforce. He was the combined form of all 6 Seacons, though only Turtlar was sentient.
Seacons:
Fiction
Animated series
Japanese manga
Zone OVA and manga

(King Poseidon is referred to as one of the 9 Decepticon Demon Generals. This terminology, accompanied with Violen Jygar's supernatural origin and the presence of dead Decepticons in the ranks implies that King Poseidon had died previously to Zone and was brought back to life.)
When Violen Jygar siezed command of the Decepticons, his first act was to recruit 9 Demon-Generals from Decepticon history. King Poseidon was selected to be one of those Generals and was given new power and weaponry to make him an even greater threat than before. King Poseidon was sent to Planet Zone along with Devastator, Trypticon and Predaking to steal the Zodiac. King Poseidon managed to get his hands on the Zodiac, and nearly made it away with the precious thingy, until it was taken away by Dai Atlas and Sonic Bomber. King Poseidon then met his end when the Zodiac was opened in front of him, unleashing its powerful energies.
==Toys==

