Primus Onslaught (formerly known as the Xenon 10,000) is the original villain of the Sega Unit Patrol Squad 1 adventure series. 100 years ago he was created in a unknown alien planet with the help of a Mysterious Figure from the future. He was made to be the most destructive fighting robot in the universe with massive powers, weaponry and a A.I. far beyond then anyone can imagine. However he became too powerful and too smart, he starts destroying everything and everyone in his path, most of them did everything they got to defeat him but it failed. As a result, then he destroyed half of the entire alien planet and he began killing more people in the universe but he defeated and sealed away by Princess Celestia and Palutena for his evil deeds, but few years later he somehow Primus manage to escape, Now that he's free he will continues to do whatever it takes to destroy all who stands in his way, even when he goes too far to win.
- Primus will face Emerl and Team Robot in Emerl's Adventures Of Power Rangers Super Megaforce.
- Primus will appear in War of the Apocalypse and will return in G-Merl's Eternal Quest.
- Primus will wield Ultima Weapon in Team Robot In Pokemon XY The Series.
- Primus has a deep hatred with Emerl and his team, even Philmac.
- Primus will return in Team Robot In Pokemon Sun & Moon The Series.
- Primus will settle the final score with Team Robot in Legendary Keyblade War (Seven Light's VS Thirteen Darkness's).