Set: Bulky Tangrowth

Tangrowth @ Leftovers

Trait: Regenerator

EVs: 252 HP / 252 Def / 4 SDef

Relaxed Nature (+Def, -Spd)

- Sleep Powder

- Power Whip

- Hidden Power [Ice]

- Leech Seed

Tangrowth's a pretty interesting Pokémon. Aside from functioning as a Chlorophyll Sun sweeper, it can also pull off a very effective physical tanking set. Thanks to Regenerator and its high HP and Defense stats, Tangrowth occupies a special niche in OU. Combine that with an effective defensively-oriented moveset, and you have an extremely durable physical wall.

To put things into perspective, Tangrowth's overall physical bulk beats that of Forretress and Skarmory. This lets Tangrowth take on a number of threats - Terrakion, Landorus, Dragonite and even Excadrill in a pinch. 

Sleep Powder provides a notable advantage over other physical walls, crippling common switch-ins like Heatran. Power Whip is a reliable Grass STAB, while HP Ice can net some surprise KOs on Gliscor and hit Dragons for good damage as well. Leech Seed works well along with Leftovers and Regenerator to ensure that Tangrowth won't be going down any time soon.

Although Tangrowth's physical bulk is fantastic, its Special Defense is particularly low. It also can't do much to most other Grass-types, particularly if they carry Natural Cure. For this reason, Latias may be a good choice for a partner. She also fits in well with the entry hazard-based defensive teams that Tangrowth tends to work best with. Other than that, Tangrowth remains a surprisingly bulky wall with some useful support options.