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This transformation exists primarily within the Sonic X continuity.
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.

Serpenter, also known as E-39 Neo in Japan, was a combined robot in the Sonic X anime series. It is formed when Doctor Eggman's numerous amounts of E-39 Quizons merged.



New World Saga

The Serpenter was formed by Eggman to combat Sonic the Hedgehog when he arrived to foil his plans. However, the Serpenter destroyed a good luck bracelet Amy Rose made for Sonic, throwing her into an extraordinary wrath. She tore the Serpenter apart in vengeance.[1]


Concept artwork


  1. Yoshimura, Kiyoko (1 November 2003). "The Last Resort". Sonic X. Season 1. Episode 9.