I’m sorry you’re getting another ultra beast question but this is just about speculation. Why do you think the ones we know about share the ability Beast Boost? Is it possibly something to do with them being out of their own world?

This is a fascinating and excellent question, actually! We know so little about the Ultra Beasts that there’s no one theory that’s more accepted in the scientific community than others, but I have my own. Namely, I think it has less to do with the affects our world has on them and more to do with their specific physiologies. It’s possible that they’re all related in some way—perhaps they’re even actually iterations of the same species, just from alternate dimension. Think of it like you and a you from an alternate timeline.

On that note, I find it quite interesting that they’re all the dominant species of their respective worlds, except for poipole (whose world we came to) and guzzlord (who appeared in an alternate version of our world). If the stories I’ve heard about them are true, anyway.

Poipole and Naganadel

Poipole
The Poison Pin Pokémon
Type: Poison
Official Registration #: 803
Entry: One of the Ultra Beasts, or strange pokémon that had appeared from another dimension. A native to a dimension populated by humans, poipole is the only Ultra Beast known to be popular enough to be used as a starter pokémon within its world, much like pikachu. It is also as capricious and mischievous as it is cute, and it’s known for attacking innocent researchers who approach it purely out of curiosity … also much like pikachu.

Bill … what did you do to pikachu? —LH

It was a pikachu, and literally nothing! —Bill

Somehow, I find that hard to believe… —LH

Naganadel
The Poison Pin Pokémon
Type: Poison/Dragon
Official Registration #: 804
Entry: One of the Ultra Beasts, or strange pokémon that had appeared from another dimension. Also the evolved form of poipole, by battle experience, if the subject knows Dragon Pulse. This massive, syringe-like dragon is known for storing gallons of toxic, highly adhesive fluids in its bulbous torso and spraying it from its giant stinger as a self-defense mechanism. The author would make a joke about any of this, but frankly, he’s above that.