Hate Sink: At the time of his debut, Aggregor is quite possibly the most vile villain save for Vilgax.

Godhood Seeker: His ultimate plan was to absorb the powers of a Celestialsapien and reshape the universe to his whim.

Evil Sounds Deep: Hes got a very deep, gravelly, sinister voice courtesy of John DiMaggio.

Kevin seems to be aware of how similar they are, and has apparently taken this to heart given how intense he is about stopping him. As noted in Shadow Archetype, he is very similar in role and personality to Kevin in the first show, as well as being of the same species, with the same powers and love of absorbing energy.

Disc-One Final Boss: He's the main villain that drives the plot for most the first season, but Kevin ousts him before the finale.

Contrasting Sequel Antagonist: In contrast to the previous villains of the series, Aggregor is more of an intergalactic threat that seeks to obtain the map of infinity that will allow him to enter the forge of creation and absorb a baby Celestialsapien to become a god and he is also a lab experiment created by using Kevins DNA to recreate the latters powers.Even Omniverse, a series fond of bringing up series' continuity, doesn't ever get an obligatory mention despite almost taking over the universe, except for two throwaway mentions. Chuck Cunningham Syndrome: After being defeated, he's not really brought up afterward.

It's assumed he can still absorb matter and energy since that's considered 'normal' for Osmosians. Brought Down to Normal: Thanks to Kevin absorbing his powers.YMMV on how it compares to Ultimate Aggregor. Body Horror: His first use of Galapagus' powers involves multiple vents opening on his body.Bio-Augmentation: According to Word of God, he's a lab experiment.Big Bad: For the first season of Ultimate Alien until he ends up hijacked by Ultimate Kevin.Anti-Magic: Courtesy of absorbing Galapagus.All Your Powers Combined: the first step in his plan is to permanently assimilate Fire, Water, Earth, Wind, and Electric powers from a quintet of aliens from the Andromeda Galaxy.While initially not especially powerful, Aggregor is a competent fighter and overall an amazingly savvy schemer who was able to trick the protagonist into reaching his goals for most of his appearance. The aliens escaped on Earth split up to escape him, leading to his arrival on Earth.

Aggregor is attempting to collect five aliens from the Andromeda galaxy and absorb them with a help of a machine enhancing his absorption powers so he can become strong enough to get his hands on what he calls the 'Ultimate Prize'. An Osmosian (Kevin's species) criminal who serves as the main villain in season 1.

Ben ten ultimate alien aggregor