Garchomp

Garchomp is a dominant force in the OU metagame thanks to its many positive traits including high base Attack, good bulk, an excellent Ground / Dragon typing, a great movepool, and an awesome Speed tier. Said STAB combination and high Attack in particular grants it the ability to punch holes in several balanced teams. Access to Stealth Rock and Swords Dance also allows Garchomp to act as a great suicide lead for hyper offensive teams. Additionally, it is able to take on a more defensive role in which it sets up Stealth Rock and phazes with Dragon Tail. This is bolstered by its Rough Skin ability, which, when combined with a Rocky Helmet, punishes physical attackers for 30% of their HP every time they use a contact move. This is especially useful against VoltTurn teams because Garchomp's Rough Skin ability punishes physical attackers while its Ground typing blocks Volt Switch. Despite all of its positive traits, Garchomp does have some flaws. It has a crippling 4x weakness to Ice-type attacks, which are often seen on faster Electric-types such as Mega Manectric and Raikou. Both of its STAB moves can be easily taken advantage of due to the prevalence of Pokemon that resist them, and Garchomp's best coverage move, Fire Blast, comes off its much weaker base 80 Special Attack. Finally, Garchomp has a Mega Evolution that boosts its offensive and defensive stats, turning it into a devastating wallbreaker. However, this comes at the cost of its Speed, leaving it outsped by even more offensive Pokemon.