Doctor Robotnik’s Energy Ship[1] (グラビトンモービル Gurabiton Mōbiru?, lit. "Graviton Mobile") is a boss that appears in Sonic the Hedgehog 3. It is fought at the end of Carnival Night Zone Act 2, and takes eight hits to be destroyed. In both Sonic the Hedgehog 3 and the locked-on version of the game, Sonic the Hedgehog 3 & Knuckles, only Sonic the Hedgehog and Miles "Tails" Prower will fight against the Energy Ship, however, it is possible for Knuckles to fight the Graviton Mobile as well.

The Energy Ship is an orange electrical mobile created and piloted by Dr. Robotnik, which has four generators with dark green orbs on them that produce electricity. On the bottom, the Energy Ship has a heavy dark green globe that is used to create a magnetic pull with the electricity generators.


When the player enters the open arena, Dr. Robotnik appears from the right side of the arena in his Energy Ship and starts following Sonic/Tails 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 and the player can open the capsule, thus completing Carnival Night Zone and moving on to IceCap Zone by using a nearby cannon.


  • In Sonic the Hedgehog 3 & Knuckles, Knuckles skips this boss battle completely by taking the lower pathway, which only Knuckles can access at the start of Act 2. At the end of the act, the player ends up in the same room, where Knuckles sends Sonic/Tails flying to the boss arena. Inside this room is a capsule and a teleporter that will transport Knuckles to IceCap Zone after finishing the act.
    • If the player takes the regular 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. EggRobo will be seen controlling the Energy Ship.
      • Beating the boss as Knuckles will cause cutscene mishaps.




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