Klinklang

Klinklang is an unusual but effective sweeper that excels against conventional offensive teams. Magnet Rise allows it to surprise and set up on slower staple Pokemon that use Ground-type moves to beat Steel like Donphan, Metagross, Nidoqueen, and Rhyperior. Other common setup fodder includes Florges, non-Thunder Wave Cresselia, and Choice-locked attackers like Gardevoir, Goodra, and Noivern. A single Shift Gear boost makes Klinklang faster than every Choice Scarf user except Noivern, and its typing grants resistance to common priority moves like First Impression and Ice Shard, so it's incredibly difficult to offensively check after setting up. Frailer teams are often unable to handle Klinklang's Steel + Electric coverage late-game, as it is only resisted by Electric-types and Water / Ground types. Balance teams without such Pokemon can be in trouble too. However, Klinklang's mediocre Attack forces it to run an Adamant nature, and it might need multiple boosts to take out bulky Pokemon like Registeel. A poor Speed tier that lies below Timid Mega Blastoise before a boost keeps Klinklang from being useful outside of late-game, when it sets up to sweep. Being a Steel-type gives Klinklang a lot of competition from Pokemon like Metagross and Registeel, which can use their valuable typing to handle Fairy- and Rock-types throughout the whole game. Using a Steel-type sweeper makes teambuilding with Klinklang much more difficult, as you miss out on that defensive presence. Gear Grind's shaky accuracy means bad luck alone can stop a Klinklang sweep, reducing Klinklang's consistency.