Rent Ben 10: Vol.8: Game Over (2007)

Ben and Gwen are zapped into a Sumo Slammers video game. At first they think the goal is to win over each other, only to find out that they must actually work together to defeat the game's cyber-uber villain in order to return to the real world. Chicago is in the middle of a long drought, so a deranged weatherman programs a robot "weather assistant" to create rain. But the robot creates a trio of weather monsters! In "Super Alien Hero Buddy Adventure", it appears that Ben's aliens have been ripped off to create a lame cartoon. Finally, an evil alien mummy challenges Ben and Gwen in a battle to obtain a rare and dangerous element.