The Pac-Men were a warp-capable species of the Beta Quadrant. They fielded Pac-Man dreadnoughts as well as Pac-Man frigates. (RIS Bouteina: "Battle at the Grave of Thoughts")
They were also fond of pizza. Caitians were known to hate pac-men. (RIS Bouteina: "Merry Christmas")
Pac-Man article at Wikipedia, the free encyclopedia.