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 disguised, 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 turn into Mucilator and falls on Crashhopper, so Ben turns into Armodrillo and throws Mucilator. Mucilator then turns into Slamworm and goes underground and attacks Armodrillo. Armodrillo then turns into Heatblast and chases after Khyber but has a surprise attack by Crabdozer. Heatblast then tries to turn into Humungousaur but turns into Ball Weevil. At first Ben didn't know how to use Ball Weevil's 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 flees but Khyber defeats him by redirecting one of his balls. Ball Weevil reverts back into Ben who is unconscious and Khyber says "Yes".

Major Events

 * Ben and Khyber fight each other for the first time.
 * 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 (Ball Weevil's predatory species) makes his 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

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, selected alien was Humungousaur)
 * Wildmutt (x2) (both times accidental transformations, selected alien was Humungousaur)
 * Crashhopper
 * Armodrillo
 * Heatblast
 * Ball Weevil (debut; first appearance)

By Khyber's Dog

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

Errors

 * Crabdozer transforms to Buglizard to melt Stinkfly's Slime. It can be see that his rear leg still have Slime. In the next scene, He doesn't have slime in his rear leg.
 * When Wildmutt tackles Buglizard, he roars without his 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.

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.