This is the first/ Larval stage of the evolution. I haven't given it a name but what I do know is that you find these guys in dark forests. Usually secluded from other pokemon and even their own species these guys use the antennae on their heads to send out ear piercing wails that is the sorrow that fills their heads. The hair on it's head is made out of the silk it produces and the eyes on it's body watch out for larger prey as the Pokemon sleeps.
On cold dark nights the first stage come together under the full moon and cry and send this out into the forests. While bathed under the moon they evolve wrapping itself in the hairish silk. During the day they live on trees draining them of sap and most nutrients. Eyes look out from the inside all around watching for Staraptors or Braviaries.
Once the second stage has drained a tree of it's nutrients the cocoon breaks open and steps out the third and final evolution. At first it's wings are blank and blood red. But after unwilling trainers pass it and treat it rudely the wings begin to collect the souls of their rude trainers. The suit is made from the hairish silk that comes from the cocoon. It has no eyes so it relies on it's smell of blood and echolocation to guide it to it's next victim.