Magnezone

Magnezone's powerful ability Magnet Pull lets it eliminate or heavily chip defensive Steel-types in Skarmory and Scizor, which many teams rely on to check some of the tier's most powerful offensive Pokemon like Latias and Weavile. It is an incredibly strong attacker in its own right, firing off powerful Flash Cannons and Thunderbolts that pressure most of the tier. However, Ground-types can switch into Thunderbolt and Volt Switch, sapping all of of Magnezone's momentum. Magnezone's reliance on Choice Specs means that, once it has successfully trapped and KOed its Steel-type target, it is forced to switch out or be sacrificed, often costing the team momentum. This is exacerbated by Volt Switch failing to pressure specially defensive Scizor, one of Magnezone's main targets. Magnezone's low Speed leaves it forced out by many of the tier's numerous offensive Pokemon, and it is unable to trap some Steel-types like Jirachi and invested Heatran effectively due to their bulk. Additionally, both Scizor and Skarmory can run a Shed Shell to render Magnezone's niche null and void.