Birds of a Feather

Birds of a Feather is the twentythird episode of Ben 10: Alien Force.

Plot
Ben, Gwen, and Kevin are surrounded by a large amount DNAliens near a forest. Ben uses Spidermonkey to face them off. As Kevin and Gwen has a hard time handling them, Spidermonkey, who's assumed to be Ben, helps. To their surprise, it fights insanely until Kevin says, "Man, I have never seen you fight like that". Spidermonkey didn't answer, making them realize that it wasn't Ben. Ben thanks him and wonders what he can do to make it up but Simion wanders back to the forest. The prince of Arachnichimps, Simion, needs help in retrieving a crystal which is the symbol of monarchy on his planet. The crystal is being kept in a base on the moon. Ben offers his help but Gwen and Kevin are skeptical. In the midst of the battle, Ben discovers that Simion has been lying, and that the crystal is actually powering an intergalactic communications station. By stealing it, Simion will prevent the Earth from calling for help against the Highbreed Invasion. Ben tricks Simion into stealing a worthless acid dispenser instead, resulting in Simion having a very unpleasant encounter with the Highbreed that employed him.

Characters

 * Ben Tennyson
 * Gwen Tennyson
 * Kevin Levin
 * Lu

Villains

 * Simion
 * Highbreed

Aliens used

 * Spidermonkey
 * Goop
 * Big Chill
 * Jetray
 * Chromastone

Trivia

 * Simion mentions his and Spidermonkey's species by name.
 * At the end, the Highbreed's red marks on his face actually seem like eyes in this episode, where others are not
 * It is unknown what happened to Simion after the Highbreed sprayed him with the acid, but it is most likely he died after the encounter.
 * It is revealed that Spidermonkey's species has a acute sense of hearing.
 * When Ben turns into Jetray, he did not say his name.
 * It is revealed that Big Chill can fly without wings and that he can freeze with his hands, which also appears in Single Handed.