Alolan Caterpie
Bug/ Dark
Ability: I guess strong jaw, seems kinda overused or stakeout.
Certain caterpie of Alola had long baffled scientists with their strange behavior. They camouflaged with their environment, pretending to be branches and parts of leaves. A normal enough adaptation, however they looked decidedly off, and they refused to eat when in captivity. No matter what kind of leaf, flower, or plant in general was placed in their enclosure, they would not eat. A breakthrough occurred when a cutiefly wandered into the building, attracted to the flowers currently trying to be given to the Alolan Caterpie. Well it turns out that without any apex bug type predators roaming the Alolan forests, the humble caterpie stepped up to the plate. The researchers were disappointed when it evolved into a regular metapod and butterfree.
Based on these little nightmares. Fun Fact, Hawaii has the only carnivorous caterpillar species in the world. They both also turn into regular moths.
https://youtu.be/K5qijI--v9E 