Rayquaza

With Mega Rayquaza ascending to the land of Anything Goes due to being too powerful, its base forme still finds itself able to tear up all manners of bulky teams in Ubers without being dead weight against offense thanks to Extreme Speed. Rayquaza's new signature move, Dragon Ascent, gives it a 120-Base Power Flying-type STAB move, something it had been lacking until ORAS's release. Dragon Ascent alone makes Rayquaza a terrifying wallbreaker able to 2HKO any physical wall that does not resist it with only one viable exception in Multiscale Lugia. Rayquaza's moveset options are also exceptional, with moves such as V-create, Draco Meteor, Extreme Speed, and Earthquake to hit any would-be checks as well as boosting moves in Dragon Dance and Swords Dance. Air Lock gives Rayquaza the rare ability to hit Primal Groudon with Water-type moves by negating Desolate Land. Due to this, along with resistances to Water and Fire and a Ground-type immunity, Rayquaza finds itself on offensive teams that appreciate a soft check to both Primals, as well as wallbreaking capabilities and revenge killing utility with Extreme Speed. Rayquaza's defensive stats, weakness to Stealth Rock, and longevity issues due to requiring a Life Orb in most cases mean that boosting sets are typically niche options; the upfront wallbreaking power of MixQuaza and Choice Band sets are generally more appreciated among Ubers teams. A slower metagame due to threats such as Primal Groudon and Mega Salamence also helps in Rayquaza's favor, as this means support Arceus formes are likely to be slower than Jolly Rayquaza, compromising their effectiveness as switch-ins.