Manectric

Manectric possesses a fantastic Speed tier after Mega Evolution, which makes it very threatening to offensive playstyles. Because of the offensive pressure it applies thanks to its great Electric / Ice / Fire coverage, it is an excellent momentum grabber with Volt Switch. It also has a decent defensive typing in mono-Electric, which, in tandem with Intimidate, allows it to tank priority moves such as Bullet Punch and Brave Bird. Unfortunately, its Speed tier isn't the best prior to Mega Evolution, preventing it from safely Mega Evolving against Keldeo, which it would normally check. It's also walled by Ground-types such as Hippowdon, which also prevent it from using Volt Switch freely, and it only has one set, so it is rather predictable. While Mega Manectric has decent power, it relies on super effective hits to defeat most walls, meaning that it will often be forced to bail out of them with Volt Switch. Overall, Mega Manectric's niche in the OU tier is a solid one, primarily as a threat to offense with a worse matchup against bulkier playstyles.