Groudon

Primal Groudon is an insanely threatening Pokemon in VGC 2019 largely thanks to its superb offensive typing and high attacking stats coupled with its only weakness to Ground thanks to Desolate Land and solid natural bulk, making it both a force to be reckoned with offensively and a behemoth to remove defensively. Its access to two excellent spread moves, Precipice Blades and Eruption, make it capable of being a physical or special attacking powerhouse. Primal Groudon also acts as one of the best Xerneas checks in the metagame, since it resists its Fairy-type attacks and can threaten back with Precipice Blades, Fire Punch, or Overheat. Ironically enough, it's also one of the best Xerneas enablers in the metagame, as it pressures every Steel-type, as well as Amoonguss and Incineroar, all of which are sizeable roadblocks for Xerneas. However, its dominance is actually one of its biggest drawbacks, as using Primal Groudon results in playing a lot of mirror matches where games can be decided entirely on EV spreads or which player has an active Tailwind. The player must also be vigilant to win the weather war against Primal Kyogre because any Water-type attack is going to have no trouble OHKOing Primal Groudon. Dragon-types and faster special attackers such as Mega Salamence, Mega Rayquaza, Lunala, and Ultra Necrozma also match fairly well against it, as they can either wall it outright or deal devastating blows before it gets to move.