UBs aren't catchable.
They show up as NPCs, can be fought, get recorded in the pokedex, but pokeballs don't work on them.
There is no way to catch a UB during a normal playthrough becauseThey are between Mythical and Legendary. You can fight them in game but only acquire them through events
>>29243907
You fuckers REALLY don't want to stop pushing your "J-just make them like my SMT super bosses" shit, do you?
>>29243907
>acquiring plot-important NPCs
anon these are not pokemon, they're basically shapeshifting ayylium people
>>29243907
This is getting out of hand. You'll bend around everything because you want them to not be catchable, won't you?
>>29244170
They're Pokemon. Why else would they have dex registration sprites and unique shinies?
even if not catchable by Pokeballs what's to stop Aether or Professor Burnett creating a new capture device for them during the story/post-game?
>>29243907
Didn't the datamine show there were special balls for catching these for post game?
>>29244304
source?