The bulk update request #11526 is pending approval.

create alias rio (8) -> rio_(disambiguation) (0)
create alias rio_the_lucario (0) -> rio_(disambiguation) (0)
change category rio_(disambiguation) (0) -> invalid

Reason: "Rio" is the name of a site-relevant movie series, the shortening of a name of a real-life location in Brazil, and a fairly common character name (particularly common for Pokémon fan characters in the lucario evolutionary line).

big ol' +1 especially since i have a lucario named rio, and riothelucario used to be my art handle long ago

This is the best way to do it.