>>35516428Shelmet, Accelgor
Paras, Parasect (unless you're willing to identify them as cicadas, which I'm not completely fine with since they also resemble crabs)
Spinarak, Ariados
Shuckle
Venipede, Whirlipede, Scolipede
Dwebble, Crustle (again, see paras/parasect)
Joltik, Galvantula
Wimpod, Golisopod
Anorith, Armaldo
Skorupi
Dewpider, Araquanid
I don't count genesect because we don't know what the thing it was built from looked like, but it was likely insect-esque.