E-Series (Sonic X)

The E-Series (Ｅ－シリーズ) is a group that appears in the anime series Sonic X. It is a line of various robot models created by Dr. Eggman to serve as his main soldiers for his attempts at world conquest. While many of them have been fully dedicated to serving their creator, others, such as E-102 Gamma, have rebelled and joined his enemies.

New World Saga
After taking Cream the Rabbit hostage, Dr. Eggman set up heavy defences around his base, awaiting the arrival of Sonic the Hedgehog. These forces included the likes of E-12 Behemoths, E-13 Guardbots and E-30 Laser Tanks. E-30s were the first to directly face off against Sonic, proving little match as he dodged their fire and proceeded to use them as jumping pads to get inside the outer walls. E-12 Behemoths were then activated as the next line of defence and proceeded to chase after Sonic, one even managing to knock him back outside of the base's perimeter. It was at this point that Tails and Amy Rose came to the rescue in the Tornado 2 by passing a Ring to Sonic, who then proceeded to annihilate the E-30 Laser Tanks he had passed before and then tore through three E-12 Behemoths before getting into the tower. Sonic confronted Eggman and while distracted an E-13 Guardbot managed to sneak up behind him before launching an attack. The Guardbot then damaged Eggman's new machine that was being powered by the seven Chaos Emeralds. The damage inadvertently caused Chaos Control to occur, sending Eggman's base, his robots, the Chaos Emeralds, Sonic and his friends to Earth.

Eager to continue his bid for world conquest on this new planet, Eggman proceeded to Station Square with E-23 Missile Wrist in tow. Emerging from the ocean waves on to the local beaches, Missile Wrist proceeded to cause havoc, destroying property, vehicles and sending every citizen in its path screaming. It soon came face to face with Station Square's local police forces, taking bullets like they were flies hitting a car's windshield and barely slowing down from a flamethrower attack before finally retaliating. Missile Wrist eventually made its way on top of a local office building where Eggman held a public broadcast, demanding the city surrender to him or Missile Wrist would destroy it. After trying to negotiate the hand over of the city with the Chief of Police and the Mayor of Station Square, Tails and Christopher Thorndyke in the Tornado 2 proceeded to attack Missile Wrist in a bid to stop the robot and its master. Missile Wrist managed to take out the plane's propeller, but it quickly switched into jet plane mode to resume the battle, barely dodging Missile Wrist's attacks. Soon after, Amy Rose would attempt attacking Missile Wrist from behind, only to find his armor too thick for her Piko Piko Hammer to break. Missile Wrist grabbed the pink hedgehog and held her hostage to keep the charging Knuckles in check. Soon after, Sonic finally arrived on the scene and Missile Wrist dropped Amy to focus its attacks on the blue blur. Sonic proved formidable, dodging a missile barrage from E-23 and proceeding to mock it and the doctor by jumping on top of the robot's retractable missiles and dancing. On Knuckles' advice, Sonic stayed atop one missile as it returned to Missile Wrist and tricked the robot into destroying it with its other missile. After managing to dodge yet another barrage, Sonic used his Spin Attack to dive straight through Missile Wrist's head, causing the robot to be destroyed. The wreckage was later recovered by the Guardian Units of the Nations and used to create their own advanced robots known as Beetles.

In a bid to capture the third Chaos Emerald, Dr. Eggman brought E-35 Funfun to Tingalin Villa where Tails, Amy Rose, Chris Thorndyke and Frances were also searching in the X Cyclone. The heroic band of youngsters did their best, but the incredibly powerful fan of Fun-Fun was too much to bear and Tails and the X Cyclone were almost crushed under the foot of the robot. Sonic arrived not a moment too soon and quickly threw the machine off balance, knocking it on to its back and directing the powerful winds towards Eggman, forcing him high into the sky in his Egg Mobile. Fun-Fun rose to its feet in a final bid to take them out, only for Sonic to deactivate it using a precise hit and the power of a Ring.

With two Chaos Emeralds in his possession, Dr. Eggman wasted no time installing both into his new robot, E-18 Guerra-Hard, and waited for Sonic's arrival. Once the blue blur was inside the Eggman's base, the doctor took direct control of his giant machine and using its incredible strength and speed managed to throw Sonic around like a rag doll, eventually pinning him against a wall. Sonic managed to push back against the hand restraining him until he could run free and eventually scaled the titanic automaton and pierced his way into its chest, retrieving the two Chaos Emeralds and using their power to destroy the robot and the rest of Eggman's base.

Trivia

 * When Eggman chooses robots with his cards, several E-Series robots (or parts of them) that were never used in the Sonic X series can be seen.
 * In the English dub of "Pure Chaos", Dr. Eggman referred to as the E-100 Series as the E-Series. This is an error; in the Japanese version of the episode, Eggman refers to the E-100 Series by their proper designation.