I can't name all of them but the best ones are: venusaur, victreebell, sceptile, shiftree, vileplume and belossum
There are no grass type Pokemon underground!
Torterra is a Grass and Ground type pokemon.
Roselia is a Grass and Poison type pokemon.
Jumpluff is a Grass and Flying type pokemon.
grass pokemon examples: chikorita, bulbasour, oddish, tropius, turtwig, and bellsprout but theres more!
Leafeon is a Grass type pokemon.
See the related link below.
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Fire type has the very strongest advantage over Grass type Pokemon
Sceptile is the Grass type starter of the Hoenn region.
Grass-type Pokemon are weak against Bug, Fire, Flying, and Ice-type attacks, but any type can damage a Grass-type Pokemon, either great or small.
Tsareena is a Grass type, and it was introduced in the Generation 7 games, Pokemon Sun and Pokemon Moon. The evolution path for Tsareena is Bounsweet (Grass) >>> Steenee (Grass) >>> Tsareena (Grass).