From the Super Mario Wiki
White Clubbas are stronger, frigid versions of regular Clubbas in Paper Mario. They live in cold areas such as Shiver Mountain and Crystal Palace and they are susceptible to fire attacks. In a certain part of Crystal Palace, some White Clubbas are required to be defeated in order to clear out the Clubba statues on the other side. One attack involves them swinging a club at Mario, while one of their alternative attacks is quickly striking the plumber with the club three times. The attacks do five and six damage, respectively.