A good guess but I just feel like that’s too obvious and someone would have tested it by now.Opal.
Lv 36 Galarian Weezing.
Lv. 37 Togekiss
Lv. 37 Mawile
Lv. 38 Alcremie (G-Max)
G-Max Finale seems to heal 20% regardless of damage.
Can't vouch for the AI, but the Alcremie set looks pretty good.
Edit: Nvm, AI is pretty derpy.
Edit: Sorry for all the edits. TM Reward is Draining Kiss.
Wack af since you get the Dazzling Gleam TM waaaaaay earlier.
I'm going to guess it changes forms when using Overdrive.