Gloom

Gloom holds a unique place with its valuable typing, being one of only two Pokemon that can handle all of Hidden Power Electric Octillery, Primeape, and Chinchou. Gloom also has an extensive movepool consisting of boosting moves like Swords Dance and Curse, status moves like Stun Spore and Sleep Powder, and the reliable healing of Moonlight. Compared to the only other available option for the role, Exeggcute, Gloom has significantly better longevity and offensive capability, as Exegggcute cannot use both Explosion and Moonlight. Gloom is a staple on defensive teams anchored by Fire-types like Ninetales and Flareon, providing a valuable defensive role and potentially being a dangerous setup threat in the right situation. However, Gloom itself has issues with several common Pokemon like Weezing, Xatu, Pineco, Ninetales, Rapidash, and Dewgong, making it heavily reliant on team support and unable to fit well on many teams. Gloom is also extremely slow, being outsped by Octillery, meaning it usually has to take a hit first before moving and is forced out often. Octillery itself even runs Ice Beam occasionally, which beats Gloom and severely diminishes its value.