Choose these images to upgrade Gravattack, Wildvine  and XLR8.

  • Feedback-Fourarms-Diamondhead-Bloxx - Gravattack     
  • Gravattack-Eye Guy-Arctiguana-Wildmutt - Wildvine        
  • XLR8 - Shocksquatch-Gravattack-Arctiguana-Diamondhead - XLR8

 

Bonus: want a free Ben 10 background for your desktop? Look no further! Click: Ben 10 Background!