Scizor

Mega Scizor's typing, great defensive stats, and access to Roost allow it to fit on any type of team and reliably check many threats in the metagame such as Mega Metagross, Choice Specs Latios, Clefable, Mega Diancie, and Weavile. The combination of its high Attack stat and Swords Dance allows it to break through many defensive cores, and STAB Technician-boosted Bullet Punch, lets it function as a revenge killer and good setup sweeper alongside Swords Dance. Mega Scizor can also provide momentum with U-turn, Pursuit trap Pokemon like Latios, and provide Defog support for its team, making it a great utility Pokemon as well. Although Mega Scizor's defensive typing allows it to check many threats, it is still vulnerable to dangerous Fire-types and Pokemon that carry Fire-type coverage such as Heatran, Mega Charizard Y, Hidden Power Fire Magnezone, Flamethrower Clefable, and Heat Wave Tornadus-T. Mega Scizor also does not have the best Speed stat, making it vulnerable to faster offensive threats like Keldeo and Thundurus.