Gogoat @ Leftovers
Ability: Sap Sipper
EVs: 252 HP, 252 Sp. Def, 4 Atk
-Leaf Blade/ Horn Leech
-Milk Drink/ Rock Slide
Sap Sipper is a bit useless for a Grass type now, because none of the spore moves work on them anymore, so you don't get a free boost with Sleep Power etc. It's already immune to Leech Seed as well. But then again, Grass Pelt is more useless competitively. I know that Florges learns Grassy Terrain, but it's still useless in light of Sap Sipper at least giving you an immunity.
I think Gogoat has a decent movepool, at least it gets access to EdgeQuake combo. Well, Rock Slide instead of Stone Edge, but the effect is the same. However, it's a shame that it's a pure Grass type, meaning it can't successfully tank without a few Bulk Ups because of its many weaknesses. Horn Leech is probably better for Gogoat, since it serves the purpose of both Leaf Blade & Milk Drink.