Iko

Iko is one of the most fearful and dangerous antagonists to ever appear in a movie and spin-off. He makes his debut in SpongeGod and Triton as the main enemy and does not appear again until Season 9 of Tales of Dawn. He was the leader of all volcano sea serpents.

Bio
Not much is known about Iko's past, but he and King Neptune used to be good friends. But he was extremely jealous of him for having control of all the seven seas and wanted his powers. Unfortunately, Iko knew the king's powers are resistant to his golden clam that can take a god's powers. But one day, he heard a few mortals talking about King Neptune and Queen Amphitrite and how they were soon to have a baby. Iko realized that he can take the baby's powers. So, during little Triton's birth celebration, he sent his trusty henchmen to steal him, but it failed thanks to Jeron. Iko and his people were kept underground as punishment. When he escaped, he took revenge on the king and his family by capturing them. However, his efforts to stop Triton and SpongeBob proved fruitless. All the serpents later turned against and attacked him. In the end, Triton killed him.

However, his soul was transferred to a necklace he wore, within the pendent that was engraved with his symbol. Neptune discovered it, taking the necklace and placing his soul in a safe container under the palace. He would reside there for nearly twenty years before Dawn and Pallas discovered him.

'Death'
Iko was killed by Triton when the prince struck The Golden Trident and Golden Spatula in his heart while he hung on to his back. Lightning sparks surrounded him, and then, clouds rolled in around the wicked serpent. With an explosion, Iko turned into red light and disappeared into the clouds, and rain fell. What was left of him was a chained necklace he wore around him with a medal on it that had an illustration of a coiling serpent engraved on it, his soul having been transferred to it.

Looks
He is a tall, large red sea snake with yellow markings on his back, and he has muscular arms. He wears a chained necklace.

When Elina revived him, he consisted of lava rock, cracks in his skin which leak with magma. His powers, along with the ability to summon magma, proved to make him a challenger.

Trivia

 * Iko's angry roars are enough to break windows and scare even the bravest mortal ever known.
 * For a long time, it appeared Iko would never be in any episode or movie after his 'death.' However, he made a return in Tales of Dawn.