Archie Sonic the Hedgehog Issue 121 was the one hundred and twenty-first issue of the main Sonic the Hedgehog comic series.
- "The Prince & The Revolution" - Chapter One
Growing ever more concerned about their son's absence, King Max and Queen Alicia send Sonic and Sally to assist Geoffrey St. John and Hershey on their mission to locate Prince Elias. Meanwhile, Geoffrey and Hershey have tracked Elias down in Feral Forest, but their plane is under attack by Dr. Eggman's forces. In the forest, a man named Joss discusses his daughter's pregnancy with a neighbor when they notice a crowd running by. Joss, overhearing that a plane had crashed nearby, decides to check it out. His daughter, Meg, heads to the backyard to speak with her husband, who turns out to be none other than Elias.
- "The Prince & The Revolution" - Chapter Two
Geoffrey addresses the people of Feral Forest, introducing himself and Hershey and warning the community about Dr. Eggman's army approaching their home. He implores them to fight for their land. While the crowd eagerly embraces the idea, Elias walks away, thinking to himself that Geoffrey's talented at making bad ideas sound good. Meg tries to talk with Elias, but he tells her he's tired of war and politics, prompting her to wonder why he refuses to tell her about his past. Some time later, Elias contemplates the futility of running away from his responsibilities when Meg brings Hershey and Geoffrey into their home as guests. They're shocked to find their prince and immediately kneel in reverence.
- "The Prince & The Revolution" - Chapter Three
Elias begins packing his bags, preparing to flee the area with Meg. Geoffrey pleas for Elias to listen to reason, but Elias lashes out, exclaiming that he refuses to take orders from him. Just then, a group of E-105 Series robots burst through the wall, and Geoffrey asks Elias if he would prefer to take orders from Dr. Eggman.
Eggman stands before the group and swarm of E-105s, gloating over his apparent victory. He cackles over his luck in capturing King Max's son, daughter-in-law, and unborn grandchild all at once when he notices a few of his E-105s falling apart. Sonic and Sally appear, but Eggman isn't intimidated. He leers at the heroes, telling them they're outnumbered, when a mob of Feral Forest citizens arrive to help take out the robots.
After a long battle, Eggman flees the scene with his E-105 army reduced to scrap metal. Sally and Elias have an emotional reunion, but Elias explains to his sister that he doesn't intend to return to Knothole. He tells her that he's come to enjoy the simple life of a woodcutter and wants his child to enjoy that kind of life as well. Despite their differences, Meg invites the group to stay for dinner.
- "Afterlife" - Part One
Mitre Kali-Ca performs funeral rites for Knuckles the Echidna, speaking of his lineage, work as Guardian, and sacrifice. The Chaotix, Julie-Su, Constable Remington, Lara-Le, and Wynmacher mourn their loss as Chaos Knuckles stands behind them, wondering how he's watching his own funeral. He then notices that he's surrounded by past Guardians, and Steppenwolf explains that members of the Brotherhood do not die; instead, they evolve to another plane of existence. Harlan tells Knuckles that their connection to the Chaos Force binds them, and all life, together.
Knuckles asks why he can't get Sabre's attention if that's the case, but Hawking says that it's impossible to look at beings on higher planes rather than lower planes and, therefore, Sabre can't see them and they can't see Athair or the Ancient Walkers. Tobor adds that they can only move to the final plane when the heralds of Aurora call for them. As Kali-Ca intoned the final rites, Knuckles suddenly notices a bright light. Two Chao-like heralds descend from above and tell Knuckles that the Chaos Force has chosen him. Kali-Ca ends her service and the Chaotix disperse as a bright light falls over Knuckles' body.
- Mina the Mongoose in "Songbird"
Mina Mongoose stands nervously on stage and barely finds herself able to speak, introducing herself to the gathered crowd. She thinks to herself that if she didn't like Sonic so much, she'd kill him for volunteering her into a concert performance. Tails asks Sonic why he put her on the spot like this, but Sonic is confident that she'll be a great singer. Mina starts to freeze on stage and silently pleads for help. Sonic gives her a thumbs-up and, feeling reassured, Mina resolved to not disappoint him and signaled for the band to start. The band begins to play and the crowd finds itself more impressed with Mina than anything as Sonic tells Tails he knows how to pick a good singer.
Meanwhile, at Castle Acorn, Sally is working with NICOLE when she hears the sound of music. She heads over to the window and is impressed to see Mina on the stage below. Sally enjoys the music while Nicole tries to coerce her to get back to work, calling the music overrated. Oblivious, Sally continues to watch as the crowd applauds. Mina jumps from the stage and runs into Sonic's arms, overjoyed at her success and thanking him. Sally, caught by surprise, sullenly returns to NICOLE. She decides NICOLE was right; it was all overrated.
Sonic reads an Archie comic about the Archie-Betty-Veronica love triangle and mentions how funny the story is. Sally barges in and demands to know why the new plot synopsis mentions Sonic falling in love with Mina. The editor asks Sonic, now lying bruised and beaten on the floor, if he meant he thought love triangles were funny when they happen to other people. On the intercom, a secretary informs the editor that Mina's also heading over to talk about the love triangle.
- Kali-La: "Though only of reasoning status a few months ago, this proud man-child of Echidnaopolis experienced more than most others do in a lifetime!"
- Geoffery St. John and Hershey locate Elias in Feral Forest.
- Elias revealed to have married another squirrel named Megan, who is pregnant.
- Elias chooses to stay in Feral Forest since he's grown accustomed to his life as a woodsman and is expecting a child.
- The E-105 Series makes its first and only appearance, being destroyed by the citizens of Feral Forest.
- Knuckles' funeral is held.
- Knuckles personally meets his ancestors from Janelle-Li to Steppenwolf. (excluding Mathias, Spectre, Sojourner, Thunderhawk, and Athair.)
- Knuckles is chosen to ascend into the afterlife.
- Mina begins her singing career.
- Elias was last seen in Sonic the Hedgehog #102.
- In the flashback of Elias running away, he is shown without a tail.
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