Probopass

Probopass has a unique niche as the only viable Pokemon with access to Magnet Pull in the NU metagame. Rock / Steel typing and impressive defenses allow Probopass to check a myriad of relevant threats such as Vivillon, Swellow, Mega Audino, and Mesprit, but its typing also leaves Probopass weak to common attacking types such as Fighting, Water, and Ground and gives it heavy competition from Rhydon, Regirock, and Steelix as a Stealth Rock setter and Normal- and Flying-type check. Being weak to such common attacking types means that despite Probopass's impressive defenses, any kind of defensive set is outclassed, and Probopass should only be running an offensive Steel-type trapping set. Also, a lack of recovery makes Probopass very easy to wear down throughout a battle. Due to its lackluster offensive stats and movepool, Probopass is often very passive and easy to take advantage of when not trapping Steel-types. Unless a team has a sweeper such as Linoone that absolutely requires the removal of Steel-types, it is not strictly necessary to use Probopass to trap them. Oftentimes running a lure set such as Hidden Power Fire Mesprit is better. Lastly, due to a lack of solid Dragon- and Fairy-type Pokemon, Steel-types have a less prominent role in the NU metagame than in most other tiers. This diminished role lessens Probopass's niche as a Steel-type trapper and often makes it dead weight against teams without a Steel-type.