A support-oriented double build where Whimsicott's Tailwind and Light Screen simultaneously raise the whole team's Speed and special bulk. Mega Staraptor and Kingambit handle the physical line while Mega Delphox covers the special line. On a turn with Tailwind up, the team can even outpace a Scarf Garchomp.
Whimsicott (Occa Berry, Prankster): Tailwind / Moonblast / Charm / Light Screen. The key support that doubles the team's Speed with Tailwind and softens special pressure with Light Screen.
Mega Staraptor (Contrary): Close Combat / Brave Bird / Roost / Protect. An honest attacker that pushes through with dual Normal/Flying STAB.
Mega Delphox (Levitate): Heat Wave / Psychic / Encore / Protect. Levitate frees it from Earthquake-line pressure while Encore locks down the opponent's setup.
Glimmora (Focus Sash, Toxic Debris): Power Gem / Sludge Bomb / Earth Power / Spiky Shield. Spiky Shield reflects contact-move pressure, backed by a wide range of special coverage moves as a secondary attacker.
Garchomp (Choice Scarf, Rough Skin): Earthquake / Dragon Claw / Rock Slide / Stomping Tantrum. Its Scarf priority in speed keeps the team ahead even after Tailwind ends.
Kingambit (Chople Berry, Defiant): Kowtow Cleave / Iron Head / Low Kick / Sucker Punch. The Chople Berry and Defiant combo means it only gets stronger when hit by special pressure, closing as the physical finisher.