In Pokemon Diamond i say Torrterra is the strongest grass and ground Pokemon because i have a level 100 one and it's great.
Torterria
piplup is the best starter pokermon piplup is the best starter pokermon --------------------------- I chosed Turtwig grass type
Look for them in the grass
Start out with chimchar, shinx, pacharisu, starly, grass type pokemon, and buizel/any other type of water pokemon.
grass
A good grass Pokemon in Diamond or Pearl would be Turtwig, his evolutions, Budew, Roselia, and Roserade. Those are the best I can think of. where to find some good grass Pokemon. I'm in the middle of training my Staraptor, and the best place to find some good grass type Pokemon, is the route before Sunyshore City, they are around level 38-43. Good place to train Staraptor, or any ice, fire or flying type Pokemon. x Hope I helped. x
It is found underground.
they're in the grass, water, and in rocks and caves
in the grass, caves, and water.
Fire: chimchar Water: piplup Grass: turtwig
probably turtwig. grass Pokemon are weak full stop.
You need a grass type, a fire type, a water type, an ice type, your legendary and a ghost or dark pokemon.