Time Cop

Time Cops are a species of Fourth-dimensional creatures whose role is to keep the balance of the space-time continuum. The actual name of the species is unknown, but they're only ever referred to as "Time Cops", so we'll call them that.

Biology
They have heads resembling testicles, and long arms.

Appearance

 * Adventures of Rick & Morty Season 2 Episode 12: A Rickle in Time
 * Adevntures of Rick & Morty Season 4 Episode 4: Rattlestar Ricklactica