Full Force Battle! Round 2 Ultra Hard 3v9 with a F2P Team
I used Swanna for heals, sync +attack and speed, Palossand for flinch and Haxorus for damage. Unfortunately I didn't get any potion MP refreshes, but still just beat the stage.
My teams grids and information below
Swanna 3/5 4* 8/20 Sand Shelter (I use her with Cynthia, Vigilance is good if not using with her)
https://pokemon-masters-stuff.github.io/?e=0&grid=AAECAwQFERMUFRcYJSgr&o=750&p=Swanna&s=3
Palossand 2/5 5* 0/20 Defense Crush 2 (To reduce the opponents defense so Haxorus does more damage, you also only need Aggravation and 1/5)
https://pokemon-masters-stuff.github.io/?e=1&grid=AAECAwQFBggKDBMjJCUnKCkqKw==&o=738&p=Palossand&s=2
Haxorus 3/5 5* 0/20 Lessen Confusion 9 (So you rarely get hit by confusion, 3/5 is good for extra damage while confused)
https://pokemon-masters-stuff.github.io/?e=0&grid=AAECAwQFHyAhIiMkJygp&o=750&p=Haxorus&s=3