The reimagined version of Alien X
First let me tell you my distain for this Alien in the series. First, he can warp all of reality, that already makes him bad in my book, he's way too powerful to be kept in the Omnitrix. Second, he can't do anything as simple as moving as finger without first having two floating faces inside his head agree to do that, how in the hell did the celestialsapiens ever progress as a species with all of them being dictated by this rule ?!
Now for this version, they are still called Celestialsapiens but that is not their natural species name, it was given to them by aliens who discovered them and named them that for their resemblance to the celestial bodies of space.
Instead of having reality warping powers, this Alien X has dimensional travel abilities.
Bellicus and Serena are believed to be the gods of the celestialsapiens and are also believed by them to have created the race out of twin galaxies.
There are only 10,000 celestialsapiens that exist in the entire multiverse and one is born every millenia.
Ancient rumors suggest that when more than one celestialsapien is present in one location, there will be a great disaster that they bare witness to before leaving as it happens.
The design of this Alien X was inspired by the Thom Kallor Starman [link]