E-115 Pi

E-115 Pi was an E-100 Series robot.

History
Pi was the sixteenth E-Series robot created by Dr. Eggman. At some point E-102 Gamma tracked it to the Great Crater of Downunda, destroyed it, and freed its Mobini battery. (ASUB)

Background Information

 * Pi was never formally introduced in the comics, but his fate was revealed in the (now defunct) Sonic Universe blogs.