Ferroseed

Ferroseed's typing, bulk, and ability to use Eviolite make it a solid entry hazard setter and a very reliable check to threats such as Kangaskhan, physical Skuntank, and Omastar. These attributes also give it a good matchup against common entry hazard removers like Alolan Sandslash and Cryogonal lacking Hidden Power Fire, as well as a clear niche over other entry hazard setters like Qwilfish, in addition to its ability to set both Spikes and Stealth Rock unlike other defensive Steel- and Grass-types like Metang and Tangela. Although Ferroseed has a low Attack stat, it can make up for it with Gyro Ball hitting frailer threats fairly hard due to its low Speed, which means that it can't be used as setup fodder by threats like Dodrio. However, while Ferroseed's typing is great, it leaves it open to threats like Gurdurr and Simisear, which can set up on it. It also finds itself unable to switch into threats like Eelektross, Victreebel, Silvally-Fairy, and Stoutland, which often run Fire and Fighting coverage to hit Steel-types, and it's also somewhat passive, which leaves it susceptible to Taunt users like Oricorio-E and Jellicent. Ferroseed faces competition from Tangela, which deals with threats like Stoutland and Kangaskhan better and has Regenerator, and other entry hazard setters like Qwilfish and Roselia, which are faster, have better utility, and, in the case of the latter, are less passive. Lastly, Ferroseed's lack of reliable recovery leaves it susceptible to repeated attacks and entry hazards, although this can be slightly alleviated by Leech Seed. It's also overly reliant on its Eviolite, which makes it extremely susceptible to Knock Off.