This is a build centered on Mega Staraptor, which spends its own HP to force chip damage on the opponent and knock down slow walls like Hippowdon, Primarina, and Corviknight first, so the firepower attackers behind it can move freely. Behind it stand the matchup-oriented Life Orb Mimikyu and the special-attacker Mega Pyroar, and the team is rounded out with a wide-speed-check Choice Scarf Garchomp and a type-complementing Sitrus Berry Primarina.
The basic flow is for Staraptor to chip down the slow walls first, opening a gap for Mimikyu, Mega Pyroar, and Garchomp to break through. Mega Pyroar was effectively the team's ace, ranked 2nd in selection rate, thanks to its power to overwhelm the then-popular Mimikyu and drop Hippowdon in one hit, while Staraptor also functioned as a selection lure, drawing the opponent into naturally bringing out Mimikyu, Delphox, and the like. Against Primarina, Garchomp, and Walking Wake, which give both Megas trouble, the team covers with Choice Scarf Garchomp's speed advantage.