Yukineige

I'm really looking forward to the release of the game.

There is a debug for v13. I don't remember where i downloaded it tho

Hurricane Noivern is also really good if you train its EVs. I think it's the elemental seed that gives tailwind. Generally i put it on my second pokemon after i take out Skarmory. Also don't worry too much, this fight nearly made me ragequit the game on my first playthrough, it's quite normal that you struggle. I recomend you looking into EVs, they are quite important for fast sweeers and rejuvenation gives you rooms where you can train them easily ( even though you don't have access to it until you have Fly unlocked since you are locked in GDC i think).

QuickClaw gardevoir was my only way to deal with toxtricity since i kept the original terrain up for Merciless Aevian Milotic. For the two steel type : Both granbull and mawile intimidate for togedemaru and granbull close combat to deal with magneton. Galar Wheezing Neutralizing gaz + Ribombee to take out the A-Raichu was also helpfull. Valarie's fight was also a nightmare. Not being able to have A-Ninetales is really annoying. Florin was really easy. The double psychic Gym i have always used a light screen Sylveon even in my "normal" playthroughs so it was fairly easy For Souta: I didn't think about slurpuff but with Def/Speed EVs Dedenne (I use debug to swap evs/nature/ability around to keep my sanity) elemental seed for skarmory/swanna+ carbink rock tomb for pidgeotto and destiny bond G-wheezing for Dragonite i managed to pull through. It's my last major fight for now but i'm really scared for Geara and Saki.

As someone who is also doing a monotype Fairy, no use items, set mod, i can confirm that this fight was really painfull. I didn't think about A-vulpix tho I personally had to rely on QuickClaw Gardevoir to win this fight so yeah it's very hard to win without luck on your side.