Mezzo Jillion is a location mentioned in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. It is a location that was known as a galactic trading hub.
The Mezzo Jillion was apparently popular with the D'novulans, as Captain Oe of the Magesteron carried Sonic the Hedgehog on a voyage aimed for it in order to help him find his way back to Mobius. Sadly, the Magesteron was destroyed during the journey, though Captain Oe's sacrifice ensured the survival of all hands. As a result, Sonic is not known to have ever made his way to Mezzo Jillion.