West Side Island (ウエストサイドアイランド Uesuto Saido Airando?), also known as The Illusionary Island, is the main setting of Sonic the Hedgehog 2. It is an island that Sonic the Hedgehog visited after saving South Island from Dr. Robotnik and where he first met Miles "Tails" Prower. Many zones of the island make reappearances in later games, even if West Side Island itself is not mentioned.
It is said that a very long time ago, the people of West Side Island used the Chaos Emeralds to advance their civilization and achieve prosperity. However, when those people tried to use the Emeralds for the wrong reasons, their prosperity vanished overnight. It is believed that the Gods sealed away the Emeralds within the island's depths.
Sonic the Hedgehog 2
In the present day, Sonic the Hedgehog was looking for new adventures following the events of his last adventure when he discovered West Side Island. Sonic landed his personal plane, the Tornado, on the island to check it out and relax, not paying attention to the fact that a certain metallic flying object was chasing him and suspiciously landed on the other side of the island.
One day shortly afterward, Sonic noticed a shy fox cub tagging behind him, who nervously scurried back into the welcoming shade of the still palm trees when he was spotted. When Sonic was not looking, the peculiar fox barely managed to keep up with the blue hero. The fox's name was Miles Prower, though he was known as "Tails" due to his two special tails, which often made him the target of bullying. However, something changed in Tails when he saw Sonic come to the island, and he made up his mind that he wanted to be cool like Sonic. Realizing that the young kid was harmless and could actually keep up with him, Sonic allowed Tails to hang around as he freely explored the island.
On an early afternoon, Tails discovered a lone aircraft stranded at the beach. Being a budding fan of machinery and vehicles, he rushed to take a closer inspection. He was admiring its magnificent build until he noticed that Sonic was taking a nap under its wing. Realizing that Sonic owned the plane, Tails gently retreated to the other side of it to avoid waking him. Suddenly, an ominous flash occurred in the direction of the nearby forest, followed by a terrific explosion. The wild fire blew away various debris, which Tails avoided by taking cover underneath the Tornado as he witnessed robots violently excavating the area. This ceaseless activity threatened to blanket the entire island in its destructive flames.
It turned out that Dr. Robotnik had detected the presence of all Chaos Emeralds after following Sonic, including the lost seventh one spoken of in the island's legend. He took the opportunity to kidnap the island's Animals to rebuild his Badnik forces and finish his ultimate weapon, the Death Egg. Robotnik now ruled the factories, refineries and cities. He's grabbed control of everything except the seven Chaos Emeralds. The speedy hedgehog went off into the forest to set things right and the curious fox followed.
Sonic and Tails subsequently journeyed through the zones of the island to chase down Robotnik. Eventually, Robotnik made his retreat from the island. In response, Sonic and Tails took to the skies in the Tornado as they pursued Robotnik's flying ship, the Wing Fortress. Close to the Wing Fortress however, the Tornado got shot down, taking Tails with it. Having no choice, Sonic took on the fortress only to find Robotnik escaping again. However, Tails came back with a hasty rocket engine repair. With Tails and the Tornado's aid, Sonic reached Robotnik's Egg Shuttle, grabbed onto it, and managed to enter the newly-created Death Egg. Just a moment later, the Death Egg exploded in a bright light that could be seen above West Side Island. Tails later found Sonic with the Tornado in the middle of the sky and thus the island was freed.
Sonic the Fighters
In Sonic the Fighters, a section of West Side Island's Casino Night was used as a fighting arena for a fighting tournament. This arena served as the home field for Fang the Sniper. The victor of the fighting tournament eventually fought here in order to earn the right to use the Lunar Fox for a mission to destroy the Death Egg II.
In Sonic Generations, as a side-effect of the Time Eater's time-traveling, a past version of West Side Island's Chemical Plant/Casino Night got transported to the White Space where it was drained of color and life.
After ending up in the White Space, Modern Sonic and Classic Sonic separately paid a visit to Chemical Plant/Casino Night. By speeding through Chemical Plant/Casino Night, the Sonics were able to fix space, thereby restoring Chemical Plant/Casino Night from its lifeless state. When the Time Eater later got destroyed, Chemical Plant/Casino Night was seemingly return to its rightful place in the timeline.
Other game appearances
Sonic Drift 2
Many zones of West Side Island are seen as multiple race tracks in Sonic Drift 2, although once again the island itself is not mentioned at any form. Many of these included Emerald Hill Zone, Hill Top Zone, Casino Night Zone and Mystic Cave Zone. There are also some original tracks as well, that would take place of the island such as Balloon Panic, which would possibly taken place of Emerald Hill Zone.
Sonic Chronicles: The Dark Brotherhood
West Side Island (although not being mentioned by its name) might appear as one of the islands in Sonic Chronicles: The Dark Brotherhood, due to the ruins of Metropolis being there. This also would confirm Blue Ridge Zone being as part of the island.
- Emerald Hill Zone - A bumpy, tropical peninsula plain riddled with abandoned emerald mines.
- Chemical Plant Zone - A factory built to manufacture industrial chemicals (possibly to supply Metropolis).
- Aquatic Ruin Zone - The half-submerged ruins of an ancient city.
- Casino Night Zone - A casino full of jackpot machines and similar objects that supply West Side Island with tourism money.
- Hill Top Zone - A mountainous region of tall "block mountains" and lava-flooded caves.
- Mystic Cave Zone - An extensive system of crystal mines full of bridges, spikes and other obstacles.
- Hidden Palace Zone - A mysterious ruin located in the deepest recesses of the island. (2013 re-release only)
- Oil Ocean Zone - A massive valley flooded by the spillage from various oil rigs.
- Metropolis Zone - A huge, industrial city made entirely of pipes, mechanical contraptions, and huge factories. It was briefly used by Dr. Robotnik as a Badnik manufacturing plant.
In other media
In the Archie Comics, West Side Island is a location on Sonic's World under the name Westside Island. Presumably, it did not initially exist on Mobius until after the Super Genesis Wave. It is the location of Mobotropolis, Knothole Village and the Wood Zone.
- Several other arenas in Sonic the Fighters looks similar to the other zones from West Side Island. For example, Dynamite Plant is mixed of Chemical Plant Zone and Oil Ocean Zone, as well Giant Wing bears resemble of Wing Fortress Zone.