Ben 10: Invasion of the Nano monsters

Ben 10: Invasion of the Nano monsters is a television movie based on Ben 10: Ultimate Alien. When Ben is supposedly killed by a race of nanotech aliens, Ben's team,  and the plumbers team up to take down these creatures to avenge Ben.

Synopsis
When Ben is supposedly killed by a race of nanotech aliens, Ben's team,  and the plumbers team up to take down these creatures to avenge Ben.

==Plot==

The movie starts off as an alien spaceship crash lands in the outskirts of Belwood while Ben, Gwen, and Kevin fights and defeats Dr. Animo. After sending Animo to jail,  Max informs him that a group of nanotech aliens call the "Nanotonians" are terrorizing downtown. As they are ready to fight the aliens,  Ben transforms into Bigchill and freezes them. But they were able to reverse Bigchill back into Ben and used a red beam that causes Ben to disappears in a flash. With everyone believing he's dead, they hold a funeral for Ben with all of his friends and family attended. Gwen, Sandra, and Julie were very upset. Azmuth did a speech of how Ben is a great hero. Meanwhile,  Darkstar, Charmcaster, Aggregor, Hex, and Dr. Viktor team up with the Nanotonians to attack Gwen and Kevin, and were overpowered by them and Cooper, who sent Darkstar, Aggregor, Dr. Viktor, and  five of the Nanotonians to the Null Void as Charmcaster and Hex got away.