>>51455695Bragging rights, and it's an added option when you can't even get one person to raid together with.
The catch rate is the same it's always been, 2%.
It's just that Kartana is a more difficult target.
Practice your circle locking and you should catch the legendary most of the time, though.
That, and this is a valuable Pokémon.
Same can't be said for Deoxys Attack forme, it's only good for farming candy, or transferring to Home and the Switch games.