Board Thread:General Discussion/@comment-32147440-20171202005054/@comment-28802873-20171218154928

Some aliens can't exist in the (Main Timeline) Omnitrix because it can't support DNA from magical creatures, like Anodites. Celestialsapiens probably changed the universe so their DNA could be sampled.

Though I expect at least one universe in the multiverse to have an Azmuth who made it possible to have magical DNA, otherwise Celestialsapiens from those universes would maybe get bored of always seeing the same things with the Omnitrix

Astile12 wrote: In a fanfic I wrote Upgrade upgrades my Omnitrix and is lost and no chance of coming back. Because the Omnitrix is now literally 1/2 Galvanic Mechamorph it can't accept the DNA properly. IDK, maybe that makes sense in this fantasy Ben 10 world. The moral of the story is sometimes you lose things for good and have to put up with it. Actually, that'd be a pretty neat explanation as to why Upgrade "got sacrificed": he literally is part of the watch, he'd have to "get out" of it or the Omnitrix would glitch (or Ben would try to Upgrade it again and risk overloading it, making it explode along with the rest of the Galaxy)