Clawhowl

Clawhowl is a weregriffin. He first appeared in NES Wellerman.

NES Wellerman
When Henryton bought a Geometry Dash-esque ship with his Mana Orbs, Clawhowl was in it. He stole the ship to go through the Geometry Dash level Deadlocked.

Virus Attack
After the Griffin AI chased Cape Kragils, Clawhowl appeared and howled at the sun.

When Henryton ran away, he was still howling at the sun. He realized that Clawhoof, Weirdtalon, Witherwings and Curlyfeather couldn't howl, so he began a Howling School. Cape Kragils' pets and Kludge (who became the school's Bart Simpson) went there.

Kludge shot some ancient teeth at Clawhowl with her catapult, which caused him to run away. It was revealed that he was infected with the Generic Virus.