Turtwig

Turtwig brings an interesting niche to the table as the only pure Grass-type that can set Stealth Rock; this, coupled with other decent attributes such as a decent movepool, defensive stats, and typing, allows Turtwig to be an adequate entry hazard setter. Aside from a great recovery option in Synthesis, Turtwig has access to two other good moves in Bullet Seed for STAB damage against Pokemon such as Staryu and Drilbur, which also happen to be common Rapid Spin users, and Superpower for coverage against Pokemon such as Magnemite and Pawniard. However, while it has a good matchup against most spinners, Turtwig falls short to other common metagame threats such as Ponyta and Vullaby. Turtwig is outclassed by Ferroseed as a Grass-type entry hazard setter and by Onix as a Stealth Rock setter due to their more useful abilities and better stats. Turtwig is also relatively passive due to its limited offensive options, moderate stats, and the drawbacks of Superpower. The biggest reason why Turtwig isn't used much is because there are better Stealth Rock setters such as the aforementioned Onix, while as a Water-type check, Grass-types such as Snivy are more reliable.