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Trivia: The film is comprised over over 180,000 individual hand-drawn animation cells, in addition to digital and 3D animation.

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Continuity mistake: During the Jax vs Cyrax fight, at one point Jax accidentally punches his arm into the wall and gets stuck. In the first shot, you can see dust or smoke shooting out of the hole, but in the very next shot, it all vanishes.

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Revealing mistake: During the Jax vs Cyrax fight, pay attention right after Jax says "Yeah, now what?!" A few shots later, Sonya is hit in the face with a weapon by one of the extermination squad members. But you can see plain as day that the weapon completely misses her. It actually goes over her head, but she still reacts as though she's been hit in the face.

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Revealing mistake: During the Liu VS Baraka fight, pay attention when Liu and the Barakas are swinging around on the chains. Several times, you can see safety-wires attached to the chains and actors. It can be hard to catch, but there are at least three or four shots where they are visible.

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Revealing mistake: When Sheeva is crushed by the cage, pay attention to the first shot as we see the cage falling towards her. You can see the cage actually come to a stop right before it cuts to the low-angle shot looking up at her screaming. (Since it would be rigged to stop above the actress so it wouldn't actually crush her. They unfortunately just cut the shot too late).

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Continuity mistake: During the chase scene with Robotnik's robotic vehicle, at one point an EMP device is launched which misses Tom and Sonic's pickup truck and instead latches onto a minivan in front of it. Except just a few shots prior, there was a wideshot of the road, and you can see that Tom's pickup truck and the robotic vehicle were the only cars on the road. The minivan just sort-of... appears.

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Continuity mistake: At the beginning of the movie, we see a portion of the climax where Robotnik is chasing Sonic. At one point in the very first shot, he runs up the side of a building, onto the roof, then back down. However, when we see the complete chase at the end of the film, he never runs up that building.

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Trivia: In the beginning of the film, young Sonic gives Longclaw a flower with spiky petals. This flower is actually based on a flower sprite from the original "Sonic the Hedgehog" video-game for the Sega Genesis. (00:02:16)

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Trivia: When Dr. Robotnik is picking out a song for the dance scene, you can briefly see the band "Crush 40" listed among the artists and playlists on his holographic projection. Crush 40 did music for the "Sonic the Hedgehog" video game series.

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Trivia: During the final battle, Sonic cripples Robotnik's ship by curling into a ball and bashing into it repeatedly. This is a reference to the video-games, in which Sonic deals damage to bosses (which are typically Dr. Robotnik) by jumping into a ball and crashing into them.

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Trivia: Sonic makes a few brief references to the "Fast and Furious" movie series. This movie is produced by the same team that produced those films.

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Trivia: During the bar scene, Sonic grabs some chili dogs out of the air and quickly wolfs them down. This is a reference to the overall "Sonic" franchise, in which his character absolutely loves chili dogs. (A fact that was first established in the cartoon "The Adventures of Sonic the Hedgehog," and was later incorporated in other media and even the video-game series).

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Trivia: The headband Sonic wears while practicing with his nunchucks features the emblem from the title screen for the original "Sonic the Hedgehog" video-game.

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Trivia: The evil creatures that attack Sonic and Longclaw at the beginning of the film are actually echidnas. Echidnas are a very important species in the "Sonic" video-game lore. (00:02:20)

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Trivia: Sonic's map of the different worlds he can go to with his rings includes a few hidden easter-eggs. In the bottom corner of the map is a picture of a "Chaos Emerald" from the video-games. There is also a world with a checkerboard pattern, which is a reference to the bonus stage from "Sonic the Hedgehog 3."

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Trivia: In Sonic's cave, he has repurposed a street-sign into a ping-pong table. If you look closely, the sign reads "Hill Top Rd. Next Exit." This is a reference to the level "Hill Top Zone" from the video game "Sonic the Hedgehog 2." (00:07:07)

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Trivia: The (quite bad) picture of Sonic that "Crazy Carl" holds up is a reference to "Sanic," an internet meme involving a poorly-drawn picture of Sonic.

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Trivia: The "Mushroom Planet" is a reference to the level "Mushroom Hill Zone" from the video-game "Sonic and Knuckles." (Although some have speculated it may also be a sly nod to the "Mushroom Kingdom" from the Nintendo video-game "Super Mario Bros.").

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Trivia: There is a mid-credits bonus scene featuring the popular character "Tails" from the video-game series.

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Trivia: The town in the movie is called "Green Hills." This is a reference to "Green Hill Zone," which was the name of the first level in the very first "Sonic" video-game. Additionally, a piano rendition of the "Green Hill Zone" music is played towards the end of the film. (00:03:55)

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