If one of the twin Koffing inflates, the other one deflates. It constantly mixes its poisonous gases.
Very rarely, a sudden mutation can result in two small Koffing twins becoming conjoined as a Weezing.
Gives full immunity to all Ground-type moves.
The Pokémon Company International is not responsible for the content of any linked website that is not operated by The Pokémon Company International. Please note that these websites' privacy policies and security practices may differ from the Pokémon Company International's standards.