Bureaucrats are administrators who have been given some additional user-management rights. They are the highest rank achievable by promotion, second only to the proprietor overall. When a user is promoted, the bureaucrat rank does not replace the administrator rank, but is merely added to it (similarly, the proprietor holds both lower ranks). Staff are designated by the highest rank they hold.
Along with the normal responsibilities and abilities of an administrator, bureaucrats can rename users, and must keep an eye on SpongeBob Wiki:Changing username for new rename requests. They also have the ability to promote and demote other users after the staff as a whole agrees on new appointments or dismissals, or if a retiring admin requests a demotion. Bureaucrats can demote themselves if they choose to step down from the rank, and can temporarily promote themselves or another user to a bot so that large-scale maintenance work does not flood Special:RecentChanges, although this is rarely necessary.
Bureaucrats are also required to step in in the rare occurrence of administrators or patrollers making mistakes, such as giving inappropriate warnings or otherwise abusing their power and authority. While the staff as a whole discuss these matters behind the scenes, any corrective measures (e.g. removing a warning provided by an administrator) should be done by a bureaucrat so that there can be no challenges to the ruling. It is expected that bureaucrats stay on top of all admin discussions and important wiki matters, and are willing to take the initiative whenever strong leadership is needed.