The servers are the seven Chaos. Chaos is power. Power is enriched by the heart.
- Ancient Echidna mantra
The Chaos Emeralds are seven powerful artifacts that come from Earth. They are the subject of many myths and legends. They take the form of diamond cut gems of varying colors (normally green, light blue, dark blue, red, purple, yellow, and grey, but there have been variations). In Eggman's Adventure, they take the center stage as the artifact of interest.
The Chaos Emeralds are said to contain unlimited power. Certain people - such as Sonic the Hedgehog - are able to use the Chaos Emeralds to transform into an extraordinarily powerful version of themselves, known as a Super form. While Super, a person is granted extreme strength and agility, nigh invulnerability, and the ability to fly. Dr. Eggman's interest in the Chaos Emeralds is generally related to their ability to power machines which would otherwise be impossible. Whether or not Eggman lacks a Super form has never been confirmed. It has been suggested that Splooshnic has a Super form. However, the game this was mentioned in is no longer considered canon.
In Eggman's AdventureEdit
During Eggman's Adventure, Baconman seized the Chaos Emeralds. He claimed that it would only be a matter of time until his Death Bacon was powered up, suggesting that he was using them to charge the Death Bacon. However, the Chaos Emeralds turned out to be being held in various locations throughout South Island. The reason for the inconsistency is unknown, though it is possible the statements were unrelated. As well, Baconman mentioned a Chaos Beam, the name of which suggests that it utilized the Chaos Emeralds.
While Eggman was seeking Baconman, he happened across a Chaos Emerald after defeating General B-1000. Upon receiving the Chaos Emerald, Eggman claimed that there were "only six more left", and suddenly shifted his objective from finding and stopping Baconman to retrieving all the Chaos Emeralds, for unknown reasons.
After Eggman's Adventure, the Chaos Emeralds vanished. Though this appears to be an inconsistency or plot hole, it is consistent with the behavior of Chaos Emeralds in the Sonic the Hedgehog series, which frequently disappear with little explanation, and are occasionally, but rarely, explicitly shown to disappear after the end of a game.