We only saw a few Bug-types debut here, however. And the only one that seemed unnecessary to me was Kailos, because it hardly did anything.
I think it ended up being Pinsir's only significant appearance in the Kanto saga, so there's that.
I'm honestly surprised Pokemon Yellow didn't have a Bug Catcher NPC with a Pinsir and Metapod in the Viridian forest as a nod to samurai. Just like the game gave nods to Joey, Giselle, and AJ.