A Hogarithm is an enemy that appears in Super Paper Mario.
Hogarithms are stronger versions of Pigarithms that are only seen in Castle Bleck (specifically Castle Bleck Interior). Like with Pigarithms, Hogarithms mainly move around in a set pattern. Attacking a Hogarithm will cause it to get smaller and faster. Defeating it altogether will cause a bunch of coins to appear.