Zekrom

Zekrom is a force to be reckoned with in the Ubers metagame, as it possesses an excellent STAB combination along with high-Base Power moves and a great Attack stat. Immunity to paralysis makes it an excellent revenge killer along with a Choice Scarf. Zekrom can lure in Ground-types and deal damage, either for itself or for another teammate, while simultaneously forcing out nearly all Flying- and Water-types. Unfortunately, Zekrom is one of many Pokemon that struggles against Primal Groudon. Though Zekrom can deal damage to Primal Groudon, the latter's bulk makes it a tough opponent for Zekrom. Moreover, Zekrom has trouble spamming its STAB attacks because Fairy- and Ground-type Pokemon are each immune to one of them. Base 90 Speed is also not good enough, as Zekrom needs a Choice Scarf to outspeed important threats such as Arceus, Latios, Latias, and Mewtwo.