Sylveon

Sylveon leans defensive rather than maximizing Special Attack, carrying enough HP and Defense to survive Dire Claw from an opposing Sneasler while Fake Out and Intimidate from Incineroar deter physical pressure. Its Speed lines up with Kingambit's, both trained to outpace Tailwind mirrors by a point or two under Mega Aerodactyl's own Tailwind. Pixilate turns Hyper Voice and Hyper Beam into spread Fairy damage, and Detect covers the turns spent setting up. It holds its ground rather than bursting down, letting the rest of the team apply pressure.