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Sonic News Network
Sonic News Network

Doctor Robotnik’s Energy Ship[1] (グラビトンモービル[2] Gurabiton Mōbiru?, lit. "Graviton Mobile") is a vehicle that appears in the Sonic the Hedgehog series. It was created by Dr. Robotnik, who used it during the first part of the Angel Island incident.



Doctor Robotnik's Energy Ship is an orange electrical mobile, which has four generators with dark green orbs on them that produce electricity. On the bottom, the Energy Ship has a heavy dark green ball that is used to create a magnetic pull with the electricity generators.

Features and abilities

Doctor Robotnik's Energy Ship can make magnetic pulls with its green ball and generators.


Sonic the Hedgehog 3 & Knuckles

In Sonic the Hedgehog 3 and its locked-on version Sonic the Hedgehog 3 & Knuckles, Dr. Robotnik used the Energy Ship in an attempt to destroy Sonic and Tails in Carnival Night Zone. However, the vehicle was destroyed by the heroes.

Other game appearances

Sonic the Hedgehog (Didj)

In Sonic the Hedgehog (Didj), the vehicle is referred to as the Graviton Mobile.[3] In this game, it was used by Dr. Eggman against Sonic in Hydrocity Zone. However, it ended up being destroyed.


Doctor Robotnik’s Energy Ship is the boss of Carnival Night Zone in Sonic the Hedgehog 3 and Sonic the Hedgehog 3 & Knuckles, and the eight boss overall. While in Sonic the Hedgehog 3 it is fought by Sonic and/or Tails, in Sonic the Hedgehog 3 & Knuckles it can also be battled by Knuckles the Echidna, although only using the right path.

Boss guide

When the player enters the open arena, Dr. Robotnik appears from the right side of the arena in his Energy Ship and starts following the playable character from above. After some time, Dr. Robotnik will drop a large dark green globe on the ground and start hovering directly above it. He will then activate four generators on the side of the Energy Ship which will start rotating around it, creating a pillar of electricity that arcs downwards around the globe. This will turn it into an electromagnet for about seven seconds and will draw the player toward it, unless they are constantly moving away. Robotnik then descends to pick the globe up to repeat the pattern, which is the player's best chance to attack the Energy Ship. However, the dark green globe will damage the player if they touch it, as will the generators while they retract after hitting the Energy Ship.

The Energy Ship has a tendency to take a long time to defeat due to the limited chances to attack it. Getting a Time Over can be the biggest problem when confronting this boss. There are several chances to land more hits on the Energy Ship by using Sonic's Insta-Shield at right time, or having a Lightning Shield. Tails can also have an advantage of being able to damage the mobile from below while in flight.

After eight hits, the Energy Ship will be destroyed. The player will then be able to open the Capsule and complete the Zone.


EggRobo piloting Doctor Robotnik's Energy Ship.

  • In Sonic the Hedgehog 3 & Knuckles, Knuckles skips this boss battle completely by taking the lower pathway, which only he can access at the start of Act 2. At the end of the act, the player ends up in the same room, where he would send Sonic and/or Tails flying to the boss arena. Inside this room there is a Capsule and a teleporter that will transport the player to IceCap Zone after finishing the Act.
    • If the player takes Sonic and Tails' path via an upwards facing propulsion tube near the beginning of the act, the Capsule won't appear, and Knuckles will need to climb up the tube to fight the boss. An EggRobo will be seen controlling the Energy Ship.
      • Beating the boss as Knuckles will cause cutscene mishaps.




  1. Sonic the Comic #37, "Sonic 3 Part 4 - The Bosses Cont'd"
  2. (in Japanese) ソニック・ザ・ヘッジホッグ3 公式ガイドブック. Shogakukan. 1 July 1994. p. 51. ISBN 978-4091024794.
  3. Sonic the Hedgehog: Level 3 game hint. LeapFrog Community. Archived from the original on 12 June 2010. Retrieved on 1 April 2021.

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