One of the missions you get after completing the main story is
Mission 21: The Plate of the Lakes. The objective is to catch Mespirit, Azelf, and Uxie
What happens if you defeat one of these Pokémon instead of catching them? Does the mission become uncompletable?
1 Answer
Online (unofficial) sources state that if you accidentally KO one of the Guardians, it will instantly respawn.
Saving before trying the battle is surely the safest move, in any case.
This is confirmed by OP:
3
