Latios

Latios is one of, if not the, best wallbreakers in the metagame thanks to its insanely strong, nearly unresisted STAB Draco Meteor. This makes sets utilizing Choice Specs very difficult to switch into, let alone wall. This is further compounded by Trick crippling almost every defensive answer. It also has a great Speed tier that allows it to outspeed prominent threats like Keldeo, Terrakion, and Garchomp. This makes it a great Choice Scarf user, as it can outspeed all other Choice Scarf users and boosted sweepers. Latios's decent bulk and typing let it check Pokemon like Keldeo, Thundurus-T, Breloom, and Gliscor relatively well, which is made even easier due to its immunity to Spikes. It can even run Recover to aid its ability to check these Pokemon and mitigate sand and Stealth Rock damage. It's also great on rain teams, where it can hit most Steel-types hard with boosted Surf. Latios can also work on sand teams thanks to sand damage wearing down some of its counters and its ability to check and remove many Pokemon that pressure sand teams well, namely Breloom, Heatran, and Gliscor. However, despite its incredible strength, Draco Meteor leaves Latios incredibly exploitable after being used and usually forces it out. This is especially bad due to Tyranitar being very common and being able to easily Pursuit trap it after Draco Meteor has been used. Latios is also very vulnerable to many common residual damage sources like sand and Stealth Rock, which impedes its ability to stay healthy throughout a match, come in to attack, and check the things it should be able to.