E-121 Chi

E-121 Chi was an E-100 Series robot.

History
Chi was the twenty-first E-Series robot created by Dr. Eggman. According to the EggNet it has been destroyed, presumably by E-102 Gamma, but due to a memory error the robot has no recollection of this happening. (ASUB)

Background Information

 * Chi was never formally introduced in the comics, but his fate was revealed in the (now defunct) Sonic Universe blogs.
 * In the video game Sonic Battle the robot designated as E-121 was known as Phi rather than Chi. According to Ian Flynn Gamma's memory error is connected to this misnumbering.