Every night, all human dreams are played out in Nightopia and Nightmare, the two parts of the dream world. In Nightopia, distinct aspects of dreamers’ personalities are represented by luminous colored spheres known as “Ideya”.

Ethan Waber, the main character, and his little sister, Lumia Waber, are at the celebration of the 100th year anniversary of the Alliance Space Fleet on the GUARDIANS Space station.

Sonic knows there are many Chaos Emeralds hidden on the island, including the powerful Master Emerald, the secret to the island’s levitation powers.

Aided by a mysterious being named Infinite, Doctor Eggman has managed to conquer most of the world, employing an army of villains under his command, including Shadow the Hedgehog, Metal Sonic, Chaos, and Zavok.

As Sonic the Hedgehog celebrates his birthday with his friends, a mysterious being known as the Time Eater suddenly appears, destroying the party and sucking everyone through various “time holes”, scattering them across different points in history.

Sonic the Hedgehog is a blue hedgehog who lives on South Island with his animal friends. He encounters an evil scientist named Doctor Ivo Robotnik.

After Robotnik’s defeat in Sonic the Hedgehog 1, he secretly follows Sonic’s biplane, the Tornado, to his vacation spot, Westside Island.

The Sonic 3 storyline commences shortly after the end of Sonic the Hedgehog 2 – Dr. Robotnik’s space station, the Death Egg, has been knocked out of its orbit after his mech suit exploded in a final showdown with Sonic, causing critical damage to the ship.