Tangrowth

As a result of its fantastic physical bulk and decent typing, Tangrowth holds a small niche on defensive sand teams as a check to Ground-types like Landorus-T, Excadrill, Gliscor, and Garchomp, as well as other threats like Tyranitar, Breloom, Salamence, and Terrakion. Furthermore, it isn't too vulnerable to entry hazards due to Regenerator keeping it healthy upon switching, and it is able to punish switch-ins with Knock Off and status. However, Tangrowth struggles due to its abhorrent special bulk, leaving it vulnerable to special attackers like Latios, Volcarona, Starmie, and Keldeo which additionally makes it mostly deadweight against rain teams. Common coverage from Pokemon it's meant to check, like Garchomp and Tyranitar running Fire Blast and Gastrodon running Ice Beam, gives it even more problems. It's also susceptible to status from Pokemon like Rotom-W, Politoed, Tentacruel, and Breloom and is unable to threaten bulkier Pokemon that aren't as bothered by status like Skarmory, Heatran, Reuniclus, and Ferrothorn outside of hitting them with Knock Off.