Night of the Ninja

Night of the Ninja is the eighth episode of Ben 10: Alien Justice Force.

Air Date
December 12, 2014

Plot
The Bellwood museum is robbed by a mysterious figure known as the Ninja. Ben discovers that the Ninja is actually Kyodai Ken, the only alien who could beat Ben when they studied martial arts together as boys in Japan 5 years ago in his master Takahiro. Ben exposed Kyodai's attempt to rob the dojo, which got Kyodai expelled and now Kyodai is back for revenge.

Characters

 * Ben Tennyson
 * Gwen Tennyson
 * Kevin Levin
 * Elena Validus
 * Violet Witch
 * Kyle Tennyson
 * Alan Albright
 * Cooper Daniels
 * Helen Wheels
 * Manny Armstrong
 * Pierce
 * Mariella Daniels
 * Kai Green
 * Master Takahiro (Ben's sensei who taught him how to control the Omnitrix and died five years ago)

Villains

 * Kyodai Ken

Aliens used

 * XLR8
 * Swampfire
 * Fourarms

Aliens Ben used 5 years ago

 * XLR8
 * Fourarms
 * Grey Matter
 * Wildvine