2.
I personally think the worst Grass/Poison type for me is the Budew line but even then I still like them. I know Foongus will be discarded tho but I cannot bring myself to attack it.
Also, there are times where I would love using this line over the other Grass/Poison-types, esp since it has the bulk others do not. Team depending tho, because if it were sun for example I would use Venusaur, now that's scary.
I do love how its name is a nod for an album called Fungus Amongus.