>>56863815>>56863859Actually, it's a mix between a suzerainy and a parliamentary democracy.
The International Pokémon League Federation is the governing body for all the regional leagues, and appoints the Elite Four members at it's discretion. Each town appoints the Gym Leaders, which are in essence the government, in each region. Those regions are subordinate to the World Pokémon Conservation Organization, or WPCO. As far as we know there is no central government in any of them, just the collection of government officials and - one can extrapolate - the bureaucratic and administrative representatives for each local government. Maybe each city does have a mayor but whose authority can be superseded by the local Gym Leader if needed.
The WPCO defers to the IPLF when it comes to official dealings in the regional league, but there's no subordination of the WPCO otherwise. Hell, given that different regions recognize league certifications from other places (like Kanto accepting Johto badges), the WPCO is probably the highest authority there is.