you could try spawn a uxie with a nearby pokemon near the event location using 17a spawn according to pokedex simply by hightlighting no. 225 in pokedex
I accidentally caught a lake pokemon before getting the lake pokemon quest (caught Uxie). Also had the pokedex complete research cheat on. Now when I'm doing the lake pokemon quest, I'm able to catch the other 2 and report them to the professor but Uxie isn't showing up in his cave. How do I fix this?