The underside of a Pyukusaur's shell is made of a similar membrane to the insides of its body. While it may not be as rigid or sturdy as the main part of the shell, it can be inflated to deflect any incoming attacks.
Pyukusaur's flower is said to take on vivid colors if it gets plenty of nutrition and sunlight. It can eject its internal organs, which it uses to engulf its prey or battle enemies.
