Quilladin is a Pokémon introduced in the sixth generation of the Pokémon series. It is the evolved form of Chespin and is known as the "Quill Pokémon." Quilladin is a Grass-type Pokémon characterized by its round body, spiky shell, and small arms. It evolves into Chesnaught at level 16. In terms of abilities, Quilladin can have either Overgrow, which boosts its Grass-type moves when its health is low, or Bulletproof, which provides immunity to certain projectile moves. Quilladin is known for its defensive capabilities and is often used in battles for its sturdy nature.