Probopass

Access to Magnet Pull gives Probopass a slight niche in PU, as thanks to this ability, it can remove several bulky Steel-types from the match, such as Aggron, Metang, and Alolan Sandslash. 4x resistances to Normal and Flying are quite useful, as they allow Probopass to, for example, switch in on a Choice Band Stoutland locked into Return and an Oricorio-E's Hurricane. Probopass has a surprisingly customizable movepool, with very useful utility and coverage options such as Taunt to cripple slower walls, Earth Power for Steel-types, and Volt Switch for pivoting working very well with it. Defensively speaking, though, its 4x weaknesses to Fighting and Ground severely hamper its viability, as both types are very common in the metagame in the forms of Pokemon such as Golurk, Torterra, and Gurdurr. It also can be hit very hard by coverage moves of these types used by Pokemon that Probopass otherwise would check, such as Kangaskhan, Stoutland, and Aurorus. Probopass has no reliable recovery, making it prone to getting worn down fast against opposing teams. Even when fully invested, Probopass is often embarrassingly weak against a lot of neutral targets. However, its biggest issue is simply that trapping Steel-types is not an especially valuable niche in PU.