Of Predators and Prey: Part 1

Of Predators And Prey: Part 1 is the ninth episode of Ben 10: Omniverse and the first part of the season one finale.

Plot
The show starts in the middle of the same flashback as The More Things Change: Part 1, Malware deactivates and drains the prototype Omnitrix.

Five years later, Ben and Rook are playing a Sumo Slammers video game when Crabdozer comes out through the wall. Ben selects Humungousaur but turns into Stinkfly instead. Stinkfly spits goo on Crabdozer's legs sticking them to the floor. Crabdozer turns into Buglizard and breaths gas onto the goo causing it to melt away. Buglizard grabs Stinkfly and throws him around and Rook shoots him. Ben is covered in spit and tries to battle him with Humungousaur but transforms into Wildmutt. Wildmutt attacks Buglizard and they end up fighting in the parking lot. Khyber, watching over the battle from a close by building, whistles causing Wildmutt to be stunned by the noise.

Then they head over to the Plumbers base where Max is trying to recapture an alien scorpion-like thing. Rook helps grandpa Max, Max reveals that the alien was for a meal he was cooking and gives some to Rook. Ben tells Max about Khyber's Pet who is hunting him. Max asks Ben what he thinks they should do. Ben tells Max an idea that Rook told him earlier but can't talk due to having food in his mouth.

Later, Ben and Rook is in Undertown to find Khyber's pet. After Rook checks someone to be Khyber's Pet in disguise, Ben and Rook fights over what they should do. Then Rook decides to leave, leaving Ben with his hoody, hoverboard, and his broken Plumbers badge (after Rook breaking it saying that he doesn't deserve one).

In a flashback, Malware is heading up to the lab of Dr. Psychobos to talk about a device he could create. However, he doesn't have DNA samples to make it work.

Ben finds Pakmar and learns that Pakmar has made a pet store. Ben asks him to bring dog whistles so Ben can try it. Ben turns into Wildmutt as Pakmar tests some whistles.

Then Ben is attacked by Khyber's pet, then Khyber himself. He turns into Crashhopper to battle. Khyber's pet then turns into Mucilator and falls on Crashhopper, so he turns into Armodrillo and throws Mucilator. Mucilator then turns into Slamworm and goes underground and attacks Armodrillo. Armodrillo turns into Heatblast and chases after Khyber but has a surprise attack by Crabdozer. Heatblast tries to turn into Humungousaur but turns into Ball Weevil. At first Ball Weevil doesn't know how to use his powers but then spits a ball and rolls around uncontrollably before seeing that the ball can explode. Crabdozer counters this by turning into Terroranchula. Ball Weevil eventually flees but Khyber defeats him by redirecting one of his balls. Ball Weevil reverts back into Ben and falls down saying "No." Khyber then picks up Ben and says "Yes." and laughs evilly.

Major Events

 * Dr. Psychobos makes his debut, and it's revealed that he hired Khyber to collect Omnitrix DNA samples for Malware.
 * Ball Weevil gets unlocked and makes his first appearance.
 * Terroranchula makes her first appearance.
 * The origin of the Nemetrix is revealed.
 * Stinkfly makes his Omniverse debut by 16-year-old Ben.
 * Ben and Rook have their first argument against each other.

Debuts

 * Dr. Psychobos (present only)

Omnitrix Aliens Debuts

 * Stinkfly (Omniverse debut by 16-year old Ben)
 * Ball Weevil (first appearance)

Nemetrix Aliens Debut

 * Terroranchula (first appearance)

Characters

 * Ben Tennyson
 * Rook Blonko
 * Pakmar
 * Max Tennyson
 * K8-E (cameo)

Villains

 * Khyber
 * Khyber's Dog
 * Dr. Psychobos (first appearance)
 * Malware (past and present)

By 11-year old Ben

 * Four Arms

By 16-year old Ben

 * Stinkfly (first re-appearance by 16 year old Ben; accidental transformation, intended alien was Humungousaur)
 * Wildmutt (x2) (first time accidental transformation, intended alien was Humungousaur)
 * Crashhopper
 * Armodrillo
 * Heatblast
 * Ball Weevil (debut; accidental transformation, intended alien was Humungousaur)

By Khyber's Dog

 * Crabdozer (x2)
 * Buglizard
 * Mucilator
 * Slamworm
 * Terroranchula (debut)

Errors

 * Crabdozer transforms to Buglizard to melt Stinkfly's Slime. It can be seen that her rear leg still has slime. In the next scene, she doesn't have slime on her rear leg.
 * When Wildmutt tackles Buglizard, he roars without her mouth moving.
 * Even though Ben said the hoverboard was the same one from when he was little, it was completely different from the old one.
 * When Ben is about to slam the Omnitrix for Crashhopper, the screen on the Omnitrix is sideways instead of straight.
 * When Ball Weevil is running in the pipe, his collar is blue in two scenes.

Allusions

 * Khyber's "Yes" quote at the end of the episode is a reference to how Megatron from "Beast Wars" always trolls on the word "yes". Coincidentally, they are both voiced by David Kaye.
 * Ben's "Make like a tree and get out of here" quote was similar to what Biff Tannen usually says in the Back To The Future trilogy.

Trivia

 * Rook tells Ben that he never saved the world by himself since he's had help.