Warning: This post contains spoilers for Sonic the Hedgehog 2!
Sonic the Hedgehog 2 is full of references to the Sonic video games, comics, and shows, as well as other popular films and memes. Much like Sonic the Hedgehog, the sequel keeps the plot fairly simple. Sonic and his new friend Tails race Dr. Robotnik and his new ally Knuckles to retrieve the legendary Master Emerald.
Those familiar with the games will recognize the new characters, as well as the Master Emerald storyline, from the games. Though Sonic the Hedgehog 2 tweaked it a bit, the basic story is still intact. The sequel also sets up the storyline for Sonic the Hedgehog 3, even though it may not feature Jim Carrey's Dr. Robotnik. The story is a fun one despite its simplicity.
Related: Why Sonic 2's Box Office Is So Good (& Broke Video Game Movie Records)
While the storyline isn't groundbreaking it does give room for the film to cram in several Easter eggs and explore Sonic the Hedgehog's powers more. Sonic 2 does a fantastic job of creating a fun family-friendly adventure while also acknowledging Sonic's history. Here's every Easter egg and reference in Sonic the Hedgehog 2.
Sonic the Hedgehog 2 starts off on the Mushroom Planet, which Dr. Robotnik has been stranded on since the events of the first film. The planet, described by Robotnik as a "portabello purgatory," is inspired by Mushroom Hill Zone, a reoccurring video game location that first appeared in Sonic & Knuckles on the Sega Genesis.
Robotnik's sanity has slipped away during his time on the Mushroom Planet, and that is reflected in his more wild look from Sonic. He is sporting a shaved head and a huge, horizontal mustache in Sonic the Hedgehog 2. His new appearance is one of the film's most
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