From Sonic Retro
- For the scener with the same name, see Master Emerald (scener)
The Master Emerald is a large, green emerald depicted in the Sonic the Hedgehog video game series.
Role in the Story
The scene originally thought that the green emerald in the Sonic 2 version of HPZ was the Master Emerald, but the interview with Craig Stitt revealed it was supposedly nothing more than a breakable block.
Sonic 3 & Knuckles
The Master Emerald appeared again in Sonic Adventure for the Sega Dreamcast, where it was again shown keeping Angel Island afloat. The emerald also held within it the ancient monster known as Chaos. In the game, it was shattered by a mysterious force, causing Angel Island to fall.
Sonic Adventure 2
The Master Emerald was again a source of contention as Knuckles fought with Rouge the Bat for possession of it. Eggman tried to steal it again while they were distracted, but Knuckles voluntarily shattered the Emerald in order to keep it out of his hands. Knuckles and Rouge then set off separately to gather the shards of the emerald for their own reasons.
The disappearance of the Master Emerald is the primary reason for Knuckles's involvement in both Sonic Rivals games. Throughout Knuckles's episode, it is revealed that the game almost takes place entirely on Angel Island, which was renamed Onyx Island in the future. It is also revealed that the Master Emerald is a transcendent object, existing simultaneously in all timelines. Its disappearance from the future caused its disappearance in all timelines.
Sonic Rivals 2
The emerald goes missing once again in Sonic Rivals 2, forcing Knuckles' hand in the story. The situation also causes the team up of Knuckles with Rouge, much to his chagrin. At the end of the game, the heroes find they were in possession of the jewel the entire time. It was sealed within the Chaos Emerald detector they stole from Eggman Nega.
Sonic Chronicles: TDB
Imperator Ix of the Nocturnus Clan echidnas initiates an intricate scheme in order to capture the Master Emerald and use its power to open a wormhole to the Twilight Cage, where his civilization has been imprisoned by Argus. This time Angel Island crashes into Eggman's Metropolis instead of the ocean.
The Master Emerald in the Archie Comic
The Brotherhood is a group of echidnas in charge of protecting Angel Island. Knuckles is a descendant from these male echidnas, and is now guardian of the island, doing what his ancestors have done for quite a bit of time.
Tikal found Chaos and the Chao in her ancient echidna family. She loved them and cared for them, but her father found out about them and wanted the power of the chaos emeralds for himself. He attacked the emeralds and tried to steal them for himself, but Chaos absorbed the power of the Emeralds and became Perfect Chaos, before Tikal appealed to the Master Emerald to seal Chaos away inside it, sealing herself in the process. We know this because Tikal's spirit is of the age when she was sealed, which is the age at which her father attacked the emerald. The Perfect Chaos catastrophy almost totally obliterated the Knuckles Clan, and the backlash from the event hoisted Angel Island into the sky. The Chao lived on and bred, however.
This is the point at which the echidnas took over in protecting the emeralds. Knuckles is the echidna that protects them in the time of the current Sonic the Hedgehog timeline, and, for most of his life, believed himself to be the last of his race (at least in the Sonic Team storyline; adaptions like the American Sonic comics have more echidnas in existence). The game canon finally took a leaf out of Archie's book in Sonic Chronicles: The Dark Brotherhood, with the introduction of the Nocturnus.
Chaos Emeralds in the Comics
In Fleetway's Sonic the Comic, the history of the Emeralds is expanded considerably, though some points contradict the storyline of the games. The Grey Emerald is said to be the most powerful of the seven, and has the ability to control the energy of the other Emeralds. However, the Master Emerald can still over-rule its power. The original form of the seven Emeralds were what is now known as the Super Emeralds. They were taken from Angel Island by persons unknown (though it was probably Dr. Ovi Kintobor, the original form of Dr. Ivo Robotnik) and began to lose their power, reverting to the small emeralds that are familiar to all the Sonic games. Dr. Kintobor planned to use the Emeralds as a storage device to contain all the negative energy in the world, but a freak accident infused him with pure chaos energy and turned him into Sonic's lifelong antagonist.
In the Fleetway comics (and contrary to Sonic Adventure), there is no positive energy in the Emeralds; only chaos energy. The Emeralds absorb chaos energy through contact, draining the victim and growing more instable. In contrast to this, Sonic absorbs chaos energy, which is why he is the only one (storyline-wise) who is able to harness their power and transform into Super Sonic. The only way to stop the transfer of chaos energy to and from the Emeralds is to keep them at a cold temperature. In the comic, Super Sonic was an insane, all-powerful version of Sonic created when he absorbs too much chaos energy and goes out of control.
It is also implied that it was the Emeralds which created the Special Stages in order to protect themselves from Dr. Robotnik. The comics also claim that the seven original Emeralds were split into fourteen - the emeralds from Sonic 2 and Sonic 3 respectively. These Emeralds were then fused back into seven in the comics. However, this is never proven or implied in the games.