|Ben 10 vs. the Negative 10: Part 2|
|Original broadcast||March 9, 2008|
|Written by|| Tom Pugsley|
|Directed by||Scooter Tidwell|
|Previous episode||Ben 10 vs. the Negative 10: Part 1|
|Next episode||Goodbye and Good Riddance|
Ben 10 vs. the Negative 10: Part 2 is the fifty-first episode of Ben 10.
The episode picks off from where the previous one left off. The villains attack the Tennysons and after a series of fights in which the Tennysons escape by the skin of their teeth, Cooper uses a set of technopathic powers to finally gain access to the base, at the same time locking the villains out.
After a voice recognition scan, Max Tennyson discovers that the Forever King was a former Plumber named Driscoll who was thrown out years earlier for stealing alien tech. After he was thrown out, he joined the Forever Knights and worked his way through the ranks until he became their leader.
Grandpa Max states that Driscoll knows the base better than anyone and will quickly find a way in, so they use the tech in the base to upgrade the security drones and set up a barricade. The villains eventually break in and force the Tennysons into the vault with the Sub Energy, Cooper is forcefully incapacitated when it's discovered that Sublimino had hypnotized him to attack them.
Despite their best efforts, the Knights gain the Sub Energy and leave the Tennysons to be dealt with by the Negative 10. Ben and Gwen engineer a plan to turn the villains against each other using their inflated egos. Grandpa Max and Gwen stay to look after the villains while Ben goes to deal with the knights as Perk Upchuck.
During the confrontation with the Knights and Perk Upchuck, the villains come to their senses and go after Gwen and Grandpa Max. They lock them in the vault, retrieve Cooper, and then leave. Outside, Perk Upchuck defeated the Forever Ninja, swallowed the Sub Energy, and defeated the Forever King. The episode ends with Ben asking Grandpa Max if he can holographically recreate the faces of Mt. Rushmore, which he had just blown off the side of the mountain.
- Negative 10
Naming and Translations
|Hungarian||Ben 10 a Negatív 10 ellen, Második Rész||Ben 10 Against the Negative 10, Part 2|
|Portuguese (Br)||Ben 10 Contra os 10 Negativos: Parte 2||Ben 10 Against the Negative 10: Part 2|
|Spanish (HA)||Ben 10 Contra Los 10 Negativos, Parte 2||Ben 10 Against the Negative 10: Part 2|
|Spanish (Spain)||Ben 10 vs. Negativo 10 II||Ben 10 vs. Negative 10 II|