Ryuuzu

Deeply grouchy and depressed bird monster with alligator-like teeth. Lamados' sibling.

They used to have an actual playable battle in a project called Opentale that my sister made but we lost it orz

From memory they had a falling feather attack (the feathers came in from opposite sides of the screen in an X shape) and an attack where their headphones would flash different colours in a certain order, and you had to move/stay still in the right order to avoid getting hit.