Let's face it, this Pokemon looks weak as all get out. It looks like a Butterfree could take it out. But it's one of the fastest Pokemon found in Sun and Moon and it has a decent Sp. Attack with a complimenting movepool.
It's a Bug and Fairy type, which admittedly gives it a lot of weaknesses, but it has an even larger number of resistances and immunities. Plus, it's comical to watch an itty bitty Ribombee one-hit KO a Garchomp.