After evolving from Quilladin, Chesnaught becomes more muscular, unlike its pre-evolution. It is also surrounded by a tough armor to protect it from attacks, and its Tackle attack is said to be extremely powerful.
Chestnaught is known to be a gentle Pokémon, who is very protective of the ones it loves. It will use its own body to shield its Trainer from harm, and will become violent if it feels they are threatened.
Chesnaught evolves from Quilladin starting at level 36. It's the final form of Chespin.