Vesasaur.
Ven because it is grass poison and poison attacks are good against grass ang vesasur can learn erthquake which can kill a fire,steel,ice so on.
Screw grass get a chansey it can learn grass moves and is like a snorlax without sleeping and it can heal itself. A lot of hp
get at TREEKO! TREEKO HAS AND ALWAYS WILL NOT ONLY BE THE BEST GRASS POKEMON BUT MY FAVORITE AND THE ABSOLUTE BEST!
torterra is the best grass type Pokemon Pokemon Pokemon Pokemon Pokemon Pokemon Pokemon Pokemon Pokemon Pokemon VULTRAE:torterra or roserade
In my opinion, Ludicolo is the best Grass Pokemon, because the Water/Grass combo is strong or neutral to most attacks.
Venasuare
An area with grass Pokemon would be best.
Electric Pokemon, and Grass Pokemon are good against water
Torterria
Ice, Grass, Water
In Pokemon Diamond i say Torrterra is the strongest grass and ground Pokemon because i have a level 100 one and it's great.
leve her and go live at your freinds house
Grass and water are best, as is ground.
Grass or electric are your best bet