Ben 10

S03:E06 - Game Over

When Ben as Upgrade and Gwen get zapped into a Sumo Slammers video game, Ben soon has to deal with Gwen's superior gaming skills, while he also tries to impress his video icon in the game. Ben finally realizes the only person he has to prove anything to is himself. Able to finally go Upgrade again, Ben uses the alien's full potential to defeat the game's shape-shifting uber-villain, allowing he and Gwen to escape back into the real world.