To avoid detection by its enemies, it hides motionlessly beneath large leaves and in the gaps of branches. It also attaches dead leaves to its body for camouflage.
Biology
Physiology
(From Bulbapedia)Cascoon is a round, cocoon-like Pokémon. It is covered in purple silk, except for two holes where its red eyes are visible. The soft silk hardens into a tough cocoon that is able to endure attacks, and this Pokémon will not move even when it is attacked. However, it never forgets the pain it endures and seeks revenge upon evolution. It lives in forests, where it hides underneath large leaves and inside the gaps of tree branches. Additionally, it camouflages itself by attaching dead leaves to its body. As its cells create energy for evolution, the inside of the cocoon becomes hot. Cracks start to form in its casing when evolution is near.
(From Bulbapedia)Cascoon is based on the chrysalis or cocoon stage of a butterfly or moth.
Name Origin
(From Bulbapedia)Cascoon may be a combination of cask (a container, often cylindrical) or casca (Portuguese for shell), and cocoon. It could also derive from cast, a shell meant for immobilizing part of the body or the method of creating said shell.