Xerxes XX

Xerxes XX is the most fearsome tyrant in the alternate universe. He is a descendant of salamander-like amphibious beings called Metavincemander ('beyond conquering lizard'). Like his enemy, Xandy, he is semi-aquatic, and swims at high speeds. His dynasty had lasted 20 generations, whereas Xerxes XX became a greedy, cruel tyrant who wanted nothing but power and conquest. He takes other nation's technology, and uses it for his own nefarious purposes. Xerxes is much taller than Xandy by 3 feet (in the SpongeBob series, SpongeBob and his sea friends are roughly the same height of their other worldy friends.)

Xerxes XX is the main antagonist of 'The Land Unknown', where he plans to kill Xandy's species to extinction by using a mystical diamond called The Diamond of the Ancients, which was only meant for Penelope Buzz.

History
The Xerxes dynasty lasted over 20 generations, and was an honorable and worthy kingdom. Xerxes XX was in line to follow in his father, Xerxes IX's footsteps and rule his swamp kingdom. But he wanted more than that. He wanted to control the world around him. So he decided to search the swamps for inspiration. He searched, swam, and climbed through the entire swamp for any inspiration he could use. This caused his parents to worry. They decided to let him have a talk with his grandmother, who was a good therapist. Xerxes explained his personal thoughts to his grandmother, and she told him that he just needed to be himself. That, however, didn't make him feel any better. He spent the next year wondering and wondering.

Xerxes' favorite animals were Hydrocabiais, which were semi-aquatic water squirrels that lived in peace and harmony. When his parents learned this, which he kept a secret, they decided to take him on a trip to the Hydrocabiais inhabited town called Buckling City, which was his past-future enemy, Xandy's hometown. He loved the Hydrocabiais species like pets, and loved to play with them. He always enjoyed being with them, and this happened to boost his confidence.

But then, the swamp kingdom was invaded by Hydrocabiais. They destroyed many homes in the swamps, killed innocent swamp inhabitants, and eventually tried to burn down the swamp's kingdom. It turns out, Xerxes XX's parents had pulled a harmless prank that had actually caused Buckling City's Water Tower to collapse, and they owed them thousands of dollars worth of property damage. But they were unable to pay the funds due to their money being spent on providing their community with food, shelter, and water. So as punishment, Xerxes XX's parents were executed.

Since this tragic invasion, Xerxes XX had begun hating the Hydrocabiais and had planned to retaliate on them, and eventually kill them off into extinction. He was immediately made new king of his swamp kingdom, and had the power to strike back on his former favorite animals. He also thought that they never gave a damn about his homeland, and thought the execution of his parents were humorous. So once he got enough technology to plan a full-scale assault on Buckling City, he unleashed it.

Xerxes XX wanted to kill every single Hydrocabiais in Buckling City, and even in other Hydrocabiais city in his UUniverses. There were mass murders, and one of them were the murders of Xandy's parents. Xandy, on the other hand, fought her way to Xerxes XX, and brutally attacked him. The two fought for half an hour, and she eventually defeated Xerxes XX. She attempted to kill him, but Xerxes managed to elude her deadly golden sword. The Hydrocabiais worshipped Xandy for standing up to Xarxes XX, and saving their city.

Xerxes XX knew that with Xandy around, he won't be able to extinct Hydrocabiais so easily. So he had to kill her first. He stole other nation's technology, including the humans that use to live in his UUniverses. However, Xandy had used the same thing, and they both fought fire with fire. Xandy had proven to be too good for Xerxes XX, and tried hard to find a good weapon to kill her. But Xandy had the same weapon every time, and was like she was one step ahead of Xerxes. Xerxes never had the chance to kill Xandy, and neither her species. But will he?...