well if you are looking for ALL the grass type moves, well , sorry, i know a lot of `em but not all!!
ok!!first we have... leaf storm, razer leaf, magical leaf, grass not,um... i know theres more... leach life i think is one..., seed dran or some thing like that... and there is not a lot of `em sorry.
all grass type moves and poison moves
Rock, Ground, and Water-type Pokemon are weak against Grass-type moves. This means Grass-type moves can deal twice the damage to the listed types.
Grass type moves and ground type moves.
Catterpie, Roselia, Scyther and many many more grass type Pokemon can learn bug type moves.
When their health is low, Grass-type moves power up.
I think none, But if you're Pokemon can learn Ice moves. It will be super effective towards grass.
I'm a gigantic pokemon fan so I know this from experience from having a torterra! 1. x4 ice 2. x2 fire 3. x2 flying 4. x2 bug if there are any I'm missing please let me know :)
grass,poison think that's it
Lapras is a Water and Ice type Pokemon so Electric type moves, Fighting type moves, Rock type moves and Grass type moves will be super effective.
ice type moves
You can counter a grass type with a flying type that would give you the best advantage because grass moves are weak against flying types and there weak against flying type moves.
a very strong grass type Pokemon who knows good grass type moves, and a rock type Pokemon that knows rock type moves. hope that helps!