>>43992438To be fair, all 3 of them have a lot to offer outside of their type.
Rillaboom has a near Incineroar-level support movepool as well as a 70 BP terrain-boosted priority STAB move.
Amoonguss is also one of the best support mons, with its great bulk, and access to Rage Powder, Spore, and Clear Smog (the latter of which is god-tier in a Dynamax meta).
And Whimsicott has one of the best abilities in the game, Prankster, as well as Tailwind, which is better than ever with the new dynamic speed mechanics.
I'm not gonna claim that they're good despite their types like an idiot, but they have a lot going for them outside of being Grass and would probably be just about as good if you replaced Grass with a different type (and of course changed the type of Grassy Terrain).
