Sonic, Tails, Amy, Knuckles e Sticks residem em Bygone Island e devem defender a aldeia sem nome em que vivem de várias ameaças, incluindo o cientista louco Dr. Eggman e suas criações robóticas.
Dr. Eggman moves in with Sonic and Tails while his fortress is under repairs. While there, he drives Sonic and Tails to the breaking point with his annoying traits.
Knuckles feels that the only reason Sonic always bests him is that Sonic has better luck. So, Knuckles tries to run out his bad luck and reset the luck balance of the universe by constantly putting himself in harm’s way.
Eggman crea una máquina que hace que el mismo día se repita varias veces, pero todo se complica cuando el tiempo del día se reduce con cada repetición.
After seeing a cross-eyed moose, Sticks is convinced that she and her friends are cursed. They set out to find a mystical marmoset who is the only one who can remove the curse.
Knuckles wants to win the village's annual Chili Dog Cook-Off and on his quest to find the perfect ingredients he meets the Pepper People, and their leader Claggerhorn who have been waiting for a savior to bring them the freedom they deserve.
When Amy realizes that Sticks is a pack rat, she forces her friend to have a garage sale to get rid of all the junk that's accumulated in her burrow. During the sale, a secret locked door to an underground world is removed and an invading horde is set free.
When Knuckles is made mayor for the day, he sends the village into chaos. Sonic and friends, and even Eggman, have to band together to stop him from ruining the village.
Eggman is making a movie about his life. He even tries to cast Sonic to play a lame version of Sonic. Is this just a bad movie or a merely a diversion for a secret evil plan?
When another Knuckles from an alternative dimension becomes stranded in their world and causes trouble for Sonic and his friends, the gang must figure out a way to get him home.
When Orbot and Cubot discover a group of rejected Cubot prototypes hiding in the jungle, they seek the help of Sonic and Tails to protect them from Eggman.
While the rest of the village is celebrating New Year's Eve, Eggman decides to slow down time in order to complete his previous resolution of defeating Sonic... somehow.
When Knuckles replaces Comedy Chimp on the Comedy Chimp show, Comedy Chimp elicits the help of Dr. Eggman to steal back the show. Sonic and the gang must save their friend.
In order to prove that he is an inventor like Tails, Knuckles challenges Tails to enter the local robot battle; little do they know Dr. Eggman has also entered the contest.
Sem ideias, Eggman chama metade da aldeia para ajudá-lo a bolar um plano para derrotar Sonic e seus amigos, e também recruta a ajuda de Shadow, um ouriço criado pelo avô do Doutor Eggman.