CascoonvsDudunsparce-two-segment

"CASCOON makes its protective cocoon by wrapping its body entirely with a fine silk from its mouth. Once the silk goes around its body, it hardens. This POKéMON prepares for its evolution inside the cocoon."

"This Pokémon uses its hard tail to make its nest by boring holes into bedrock deep underground. The nest can reach lengths of over six miles."