In “Sonic the Hedgehog 2” (2022), Sonic, eager to prove himself as a hero, stays in Green Hills while Tom and Maddie go on vacation. However, Sonicโs peaceful life is disrupted when Dr. Robotnik returns with a powerful new ally: Knuckles the Echidna. Together, they seek the legendary Master Emerald, an artifact that grants immense power and control over the universe. Knuckles, motivated by a personal vendetta, is misled by Robotnik into thinking Sonic is his enemy, setting up an intense rivalry between the two.
Meanwhile, Sonic teams up with Tails, a brilliant young fox with a knack for gadgets, who has admired Sonic from afar and comes to help him thwart Robotnikโs plans. As Sonic and Tails travel across various locations to locate the Master Emerald before Robotnik, they form a strong bond of friendship and teamwork. They battle Knuckles and confront Robotnik in an epic showdown, with Robotnik ultimately betraying Knuckles to seize the Emeraldโs power for himself, transforming into a massively powerful version of himself.
In a climactic battle, Sonic and Knuckles set aside their differences and team up with Tails to stop Robotnik, retrieving the Master Emerald and restoring peace. Knuckles realizes Robotnikโs deception and joins Sonicโs side, forming a new alliance to protect the Emerald and maintain balance. In the end, Sonic embraces his new role as a hero with his friends by his side, hinting at more adventures to come. The film concludes with a post-credits scene teasing Shadow the Hedgehog as a new potential threat for the future.