Slix Vigma is an alien robot that first appeared in Grudge Match.
Slix Vigma traveled through the universe capturing aliens and used them to fight for the amusement of the galaxy. He teleported the aliens into his ship, where he forced them to fight each other in arenas by using electronic implants. These illegal fights used to be watched by huge audiences.
In Grudge Match, Slix Vigma controlled the Megacruiser and used it to attract the alien public to gladiator-like fights. He kidnapped both Kevin 11 and Ben to fight for him after he observed them fighting on Earth. Ben used Upgrade to overpower him, although it was a little hard to take control of him. When Ben timed out, Slix attempted to kill him for that, leading to Kevin 11 ultimately destroying him.
- Grudge Match (first appearance; destroyed)
Ben 10: Omniverse
- No Honor Among Bros (first re-appearance)