Eclipio

Eclipio is a Bug/Dark-type Pokemon. It evolves from Umbrect and is the final form of Murchnid.

Description
They are known for their vengeful nature. When they encounter something they hate, they usually are seen brutally stabbing it with its claws and tail. Humans are careful not to upset this Pokemon.

It also possesses a special poison that, oddly enough, is no biological, but a psychological threat. Humans infected by it wither away until only their worst qualities remain.