So I'm guessing before we debate other matters, considering Dark Bowser's inhale is what he leads with, if I remember what I read in this thread right, we have to go over if Ultra Beast Resistance to Sealing is sufficient.
Basis being that Ultra Beasts are Pokemon, which are more likely to break out of all kind of Poke Balls -Technology regularly made & used to seal Pokemon- other than Beast Balls.
Here's the dialogue I could find on the topic. Scans are harder to find:
bulbapedia.bulbagarden.net
Regardless of choice:
"Those are Beast Balls, which the Aether Foundation developed in great secrecy... They are a special kind of Poké Ball that are specialized for capturing Ultra Beasts. As a result, they are very expensive to make, so we have not been able to mass-produce them. Please consider your timing very carefully for when you will use them during a battle."
Tell me about the Beast Balls:
"Ultra Beasts are life-forms from another world. If you try to throw a regular Poké Ball at one, the ball will have a difficult time recognizing the creature as a Pokémon, and so the capturing function will be significantly impaired. But these special balls should allow you to capture beasts quite normally. They could be considered the foundation's negative assets, but I hope they will help you."
Other dialogue about them:
"Those are special Poké Balls that we developed with the Ultra Recon Squad's help to capture Ultra Beasts. I know I can trust leaving them in the hands of a Trainer like you."
- Lusamine, to the player, in US/UM, seemingly about catching Ultra Necrozma.
Looker also has dialogue about them:
"But now we should get our heads on straight and get to work! I do not like it, but I am in charge of backup once again! And for you, <player>. The Beast Balls you will need for this mission!"
- If asked about Beast Balls while having at least one in the Bag
"Beast Balls are incredibly valuable Poké Balls! I asked Madam Wicke, who works in the secret labs, and she said a single ball costs millions! It appears you still have some on you, as well. Be very careful about using them!"
- If asked about Beast Balls while having none in the Bag
"What?! You mean you ran out of Beast Balls?! Well...then I suppose I must give you one of the extras that I have been holding in reserve!"
Looker is an International Police officer, for those who don't know. So I consider him a fairly reliable source of info.
Looker says a single Beast Ball costs "millions". I don't know if Pokemon world money corresponds to JPY or what, presumably so, & I'm not sure if the localization changed thousands or something to "millions"; 1 million JPY today would only be about 7,000 USD. Maybe it was more expensive in Japanese, or localizing to English changed the number? IDK.
Point is, they're expensive tech, but it's unclear HOW expensive without knowing the dialogue in the original language.
Info on Beast Ball's function in gameplay:
If the wild Pokémon is an
Ultra Beast, it has a 5×
catch rate modifier; otherwise, it has a 410/4096× (~0.1×) modifier.
According to Bulbapedia's summary of the
Sun, Moon, Ultra Sun & Ultra Moon chapter (Adventures) on their
Ultra Beast page:
Afterward, Nihilego captured Guzma and dragged him into an Ultra Wormhole with it. The other beasts escaped from Po Town's barrier, allowing them to wreak havoc on the rest of
Ula'ula Island.
Anabel and
Looker arrived shortly thereafter, and while Looker went off to investigate the Ultra Beasts that broke through the walls, Anabel assisted Sun and Moon in battling a
Blacephalon. Anabel attempted to capture Blacephalon, only to discover that ordinary
Poké Balls do not work on Ultra Beasts. Before Blacephalon could retaliate with
Mind Blown,
Tapu Bulu blew it away. Afterward, while Sun, Moon,
Professor Kukui, and
Professor Burnet gave Tapu Bulu a
Mirage Berry, Anabel speculated that there was
a certain person hiding in Alola, who was capable of creating Poké Balls that would be able to capture Ultra Beasts.
May be worth getting scans or such, or seeing if anyone has already documented it, so as to help clarify that ostensible Resistance.
Hopefully this is helpful, or at least interesting information.