Probopass

Thanks to its ability Magnet Pull, Probopass functions as an effective trapper for Steel-type foes like Mawile, allowing teammates like Muk and Silvally-Dragon to more effectively break the opponent's team. Access to Smack Down and Earth Power also means Probopass can notably trap and KO Bronzor, which is the most common Steel-type. In addition, its solid bulk, low Speed, and access to Volt Switch allow Probopass to function as a decent specially defensive pivot and be one of the better Stealth Rock setters in the tier. However, Probopass's defensive typing is awful, leaving it 4x weak to Fighting and Ground as well as weak to Water, making it easily revenge killed by a wide variety of threats, such as Silvally-Fighting, Floatzel, and Komala. Due to its mediocre offensive stats, Probopass has to rely on a Z-Move to consistently trap Bronzor, meaning it takes up that slot for its team. This also means Probopass cannot hold Leftovers if it wants to trap effectively, meaning it gets worn down easily, especially when combined with its lack of recovery. Lastly, it faces competition from Alolan Golem as a trapper, which is much more offensively inclined and thus more threatening, though Probopass is more consistent in general and can more easily fit utility moves like Stealth Rock onto its set.