The central area of the of the Chaos Energy Cannon is a dome-shaped plaform. Inside it is a large room with windows on the walls, which holds the plaform for trapping Super Sonic and a seat for the Egg Mobile. Surrounding the Chaos Energy Cannon's main plaform is a ring with seven smaller ellipsoid-shaped units attached to it. Each of these units are attached to the main plaform by a small bridge. The Chaos Energy Cannon's main feature however, is a large silo on the bottom, which can split apart to reveal a the collapsible barrel of an energy cannon.
Features and abilities
The Chaos Energy Cannon is designed to take the Chaos Emeralds and reverse their polarity, thereby forcing them to produce negative chaos energy, which is then fired as a massive beam. The effects of this blast is capable of forcing Dark Gaia, an entity feeding on negative energy, to awaken prematurely.
In the center of the Chaos Energy Cannon is a platform-like device with retractable pillars that create a high energy field. This energy field is capable of completing restraining even Super Sonic and then strip him of his power by painfully ripping the Chaos Emeralds out of him.
Prior to Sonic Unleashed, Dr. Eggman learned of Dark Gaia. Seeking to harness this creature's power for his Eggmanland project, Eggman figured out a way to awaken Dark Gaia from within the planet's core with negative chaos energy, and designed the Chaos Energy Cannon for this purpose. For the Chaos Energy Cannon to work however, Eggman needed the seven Chaos Emeralds, which was in the possession of Sonic the Hedgehog. The doctor thus planned to launch his space armada for the purpose of luring Sonic and the Chaos Emeralds, which the doctor anticipated Sonic would use to turn into Super Sonic, into his Chaos Energy Cannon.
In Sonic Unleashed, Eggman's plan came to fruition when Sonic arrived to stop Eggman's fleet and went Super Sonic. While escaping from Super Sonic, Eggman lured him into the center of the Chaos Energy Cannon, where he trapped Super Sonic in the cannon's energy field and robbed him of the Chaos Emeralds, thus completing his Chaos Energy Cannon and allowing him to awaken Dark Gaia with it, resulting in the planet being broken apart by Dark Gaia's awakening. Meanwhile, due to his close proximity to the Chaos Emeralds, the feedback created from the Chaos Energy Cannon caused some of Dark Gaia's energy to infect Sonic, causing him to transform into Sonic the Werehog for the first time. In addition, the Chaos Energy Cannon drained the Chaos Emeralds of their power, leaving them inert. After the Chaos Energy Cannon had served its purpose, Eggman expelled both Sonic and the Emeralds from the Chaos Energy Cannon.
Despite its success, Eggman's usage of the Chaos Energy Cannon yielded undesired results; even though it awoke Dark Gaia, the beast had not matured enough, and therefore broke apart and scattered across the world, leaving Eggman with the task of reconstructing it.
↑Sonic Team (9 December 2008). Sonic Unleashed. PlayStation 3. Sega. Area/Level: Spagonia. "Professor Pickle: It appears the planet's core has long acted to incubate Dark Gaia. Now, thanks to Eggman's Chaos Energy Cannon, it's come out to say hello. Now we all have the both of them to thank for a shattered planet. Hmph!"