Klefki

Klefki's wide support movepool, which includes Spikes, Thunder Wave, and dual screens, coupled with Prankster allow it to function as a very effective support Pokemon. Its Steel / Fairy typing gives it numerous resistances and immunities to common attacking types, allowing it to check threats such as Mega Gardevoir, Mega Pinsir, Latios, and Weavile. Notably, Prankster Thunder Wave allows Klefki to act as a catch-all stop to most setup sweepers. Klefki has access to Magnet Rise, which gives it the ability to avoid Ground-type attacks for five turns, which alleviates one of its only two weaknesses. Unfortunately, Klefki has subpar stats overall and lacks significant offensive presence.