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Experiment 999
Ultimo originates from the 9th dimension, which is the 2nd, 3rd, and 4th dimensions combined, and everything is made out of this goo that tears literally anything apart atom by atom to conjoin with it if completely absorbed. Some researchers from the 4th dimension found this dimension via portal, and they started to experiment on this goo (which Ultimo calls it "Chaos Energy"), they found out that if a specific amount and variety of molecules combines with it, it'll transform into new life. The researchers did many tests, most were a success, Ultimo however, is a different story. While the researchers were consructing him, they used too much, and he slowly started melting so they had to create a medicine that would help him keep his shape, which after several attempts, it worked. They took good care of him, the other Energens welcomed him, he was a happy feline, some of the researchers managed to give him limitless power, which. One day, being the curious cat he is, wondered what else is out there, and like some of the Energens, he took off to explore the universe, before he left, they put a tracker on him to ensure he's safe. Many, many years of exploring later, he decided to create his own multiverse, so he used his power to create 2 universes: his universe and the Object Universes, he had a lot of fun making all the contents inside both. Eventually, he decided to make his own home, and looking at what he saw on Earth briefly (he also cloned Earth to make it the exact same here), he decided to make his own home, so he used what he learned from Earth's history, and formed Imaginaria, and he buried himself underground in hibernation to wait to see how it turns out. Once the year 2165 rolled around, he broke free, he kept an eye on everything while buried, and he wanted to see the world for himself, he was very proud of his work, eventually, 7 years later, he met all of his friends while traveling the planet, which he is grateful for to this day, he also met Castor, Thunder, Magma, Diamond, Bloom, Evoli, Heatwave and Stead, who he all enjoys hanging out with.
Eventually, the researchers saw Male Castor and Female Castor's works, so they converted the medicine they created into a 3D object (don't ask how they did it), and sent to him with a note saying: "Keep him happy and healthy for us. -[REDACTED]"
