Rook's History
Rook made his debut in The More Things Change: Part 1, when he is called to Earth by Max Tennyson to be the partner of his grandson, Ben Tennyson. Rook first meets Ben in Mr. Baumann's shop, where he is quietly enjoying his meal in disguise. Ben, in the form of Cannonbolt sits next to him and asks Rook if he can have his food. Just as Cannonbolt is about to begin eating, the trio of alien criminals arrive. Cannonbolt starts to fight the criminals, causing major havoc. While everyone is escaping, Rook continues his meal calmly. After the criminals planted a bomb in the store and Ben is unable to transform, Mr. Baumann sarcastically mentions that Ben's friends should show up and save the day. Hearing that, Rook drops his food and starts to run towards the criminals. He quickly takes down the villains, then introduces himself to Ben and reveals that they are partners now. Rook tells Ben that it is an honor to meet him and that he had learned about his heroics at the Plumbers' Academy. Ben transforms into Bloxx and tells Rook to disarm the bomb, while he takes down the criminals. Rook tells that he can't disarm the bomb in time and blows a hole on the wall of Mr. Baumann's shop in order to detonate it away from the populous. They managed to move the bomb so it was able to explode further away. However, the criminals escaped by running into the crater that the explosion caused where Ben, Rook and Khyber's dog follows them.
In The More Things Change: Part 2, Ben and Rook continue to chase the criminals in a newly discovered Undertown. Rook begins to chase Fistina who manages to run into a tunnel along with Bubble Helmet. However, Liam gets left behind and Rook is able to shoot an electric web at him with his Proto-Tool. Rook and NRG start to question Liam but a hover bus knocks them over and takes them to the Undertown market. Rook wants to chase the lowlifes but Ben tells him that they should rather be exploring. Ben is trying to enjoy Undertown, however, Rook constantly begins to interrogate and scare away citizens. Ben tells him to relax and that the bad guys will eventually come to them. Suddenly, Buglizard appears and starts to fight Ben who accidentally turns into Water Hazard. Rook wants to help him but Ben tells that he got this. However, Buglizard quickly takes down Water Hazard without taking one hit, he then tells Rook that it is time for him to interfere. Rook shoots an energy rope at Buglizard which wraps her mouth for a short time and makes Water Hazard overpower her. Khyber, seeing that two fight against one, calls the situation unsporting and whistles retreat to his pet. Rook tells Ben that he had found out the location of Bubble Helmet and leads him to the Gas House. Rook kicks the door and tells everyone to put their appendages to the air. Ben, turning into Terraspin tells him that he shouldn't always reveal his badge and absorbs the poisonous gas to make the customers choke. They find Bubble Helmet and ask who is behind the shakedowns. Bubble Helmet says that he will tell them as soon as he can breathe again and Rook, not knowing the common trick puts his helmet back onto his suit. While, following an escaped Bubble Helmet, Terraspin realizes how unexperienced Rook is and that he hasn't fought any actual bad guys so far. It turned out that Bubble Helmet lead them straight to his boss, Psyphon. They begin to fight with Psyphon's henchmen as well as start to destroy his shakedown machines. Psyphon manages to take down Ben and is about to torture him when Buglizard appears again. Psyphon retreats and Rook follows him, while Shocksquatch fights Buglizard. Rook gives a final warning to Psyphon who starts to shoot laser beams at him. Psyphon becomes amazed after seeing Rook's armor and that his attacks made no damage on it. Rook tells him that the armor is not for sale, not knowing Psyphon didn't mean to buy it. Meanwhile, the fight between Shocksquatch and Buglizard caused a tunnel to collapse right onto Psyphon. At the end of the episode, after everyone got arrested Rook brings Chili Fries to Ben which makes him finally accept Rook as his new partner.
In A Jolt from the Past, Rook and Max were kept waiting at the Plumber HQ by Ben who was late because he dropped by Mr. Smoothys. Rook tells Ben that instead of his car, they will use Rook's Proto-TRUK from then on. Ben's first impressions of the vehicle were negative but after Rook transformed it into its space ship mode Ben admitted that sometimes he can be kind of awesome (with the emphasis on sometimes), much to Rook's joy. After they left the base, Rook felt like Ben was angry with him. Ben tells him that he is just bored and he hasn't been acting like a superhero lately, then he apologizes to Rook for keeping him waiting around. Rook tells Ben that he is looking forward to their partnership, after mentioning how many times he saved the universe and that he hopes that Ben will live up to the legends. Rook mentions that he thinks Alien X is a just rumor made up by a fan but Ben tells him that Alien X is real. Rook gets excited and asks Ben to turn into Alien X immediately but due to former incidents, Ben opposes. Ben then tells Rook to find him some hero-ing to do and he will then live up to the legends. Unfortunately, Ben constantly fails to show off his abilities, since aliens in Bellwood act natural opposing what he was previously experiencing. After a lunch break, they spot a guy who is using alien technology and begin to follow him. However, the guy shoots at them and escapes with a muscle car, so they begin to chase him. After a quick chase, they capture the guy and quickly discover that he uses Nosedeenians to power his car. Rook tries to fight the Nosedeenians but due to lack of experience with them, he quickly gets tricked and zapped continuously. Ben and Rook split up, so Rook can tell Ben where the aliens are heading. While chasing them as Clockwork, Ben realizes that the aliens are not escaping but leading them to an old storage. They enter the building where they discover that someone is using the Nosedeenians as a power source. They soon get trapped in an electric field, however Rook quickly sets them free. He, with the help of Bloxx, defeats and captures the thugs while their leader manages to get into a robot suit. Rook starts to shoot at the armor but Ben explains him that they can't fight back due to the Nosedeenians. With the help of Ben's new transformation, they manage to beat Fistrick and save the Nosedeenians. After the bad guys got taken away by the Plumbers, Rook says that the Tennyson legends always end with some type of beverage. However, Ben corrects him that at night they eat chili fries, much to Rook's disappointment.
These are just the first three episodes from Ben 10: Omniverse. Throughout the series, Rook accompanies Ben on almost all of their adventures.
