The entry states " Enthusiastic fans also found that Amy Rose was supposed to appear in a scrapped Sound Test mode in other leaked versions." In truth, the Sound Test and Amy's appearance were not scrapped, and can still be accessed and viewed in the final game via a cheat code in the color test.

Ice Paradise's section is erroneously accompanied by two screenshots of Ice Mountain Zone from Sonic Advance. The section's entry for Mecha Green Hill Zone states that Eggman has "completely converted the Green Hill Zone of Sonic the Hedgehog 2 (8-bit)." In actuality, the Zone in the latter game is called " Green Hills Zone".Adventures of Sonic the Hedgehog (1993) · Sonic the Hedgehog (1993—1994) · Sonic Underground (1999) · Sonic X (2003—2005) · Sonic Boom (2014—2017) · Sonic Prime (2022-present) SONIC THE HEDGEHOG ENCYCLO-SPEED-IA HC (DELUXE EDITION). Dark Horse Books. Archived from the original on 24 November 2021. Retrieved on 24 November 2021. Title Screen. The Spriters Resource. Archived from the original on 18 December 2021. Retrieved on 19 December 2021. Seaside Hill. Game Banana. Archived from the original on 21 December 2021. Retrieved on 21 December 2021.

The Orbinaut's description is identical to the Crabmeat's description: " It crawls over a small area, occasionally launching projectiles from its claws." In Metal Madness' section, it states: " His glowing weak points change color, showing which skill type he's currently immune to." The " immune to." fragment is accidentally also added to the end of the Metal Overlord's description, leaving a broken sentence. Anniversaries ( 10th, 15th, 20th, 25th, 30th) · Conventions ( Sonic Boom, Sonic Party 2002 Summer Festival, Sonic Party 2003 Summer Festival, Summer of Sonic) · Fast. Friends. Forever. · Franchise timeline · Ken Penders' legal cases · Project Sonic · Sonic 2020 · Sonic Generations of Skate · Sonic in Sydney · Sonic the Hedgehog 30th Anniversary Symphony · Steve Aoki x Sonic Concert · Sonic Symphony World Tour King Shahryar's entry states " He mistakes Sonic for the Ma Djinn forces of Erazor." In Sonic and the Secret Rings, this never happens (not even in an implicit manner), with Shahryar merely finding Sonic insolent.The Robo Kukku is erroneously stated to be found in Battle Fortress 1. In truth, they are exclusive to Battle Fortress 2. Hero Chao's appearance as a spirit in Super Smash Bros. Ultimate is not included anywhere in the section. A series of children's picture books were published by Golden Books, featuring the art of Art Mawhinney. Titles include Up Against a Wall, The Secret Admirer and Sonic's Shoes Blues. By 1994, the series had sold 550,000 copies, including 250,000 copies of Sonic's Shoes Blues and 300,000 copies of Sonic's Secret Admirer. [3]

Sonic the Hedgehog (promotional comic book released in 1991 and featured in Disney Adventures, Electronic Monthly and Sega Visions magazines) Sonic the Animation (1997) · Sonic: Night of the Werehog (2008) · Sonic Mania Adventures (2018) · Team Sonic Racing Overdrive (2019) · Chao In Space (2019) · Around the World in 80 Seconds (2020) · Sonic Colors: Rise of the Wisps (2021) · Sonic Drone Home (2022) · Sonic Frontiers Prologue: Divergence (2022) · Sonic Superstars: Trio of Trouble (2023) · Ghost Tale (2023) The screenshot used to illustrate the Dream Fencing event from Mario & Sonic at the London 2012 Olympic Games instead uses a screenshot of the same event from Mario & Sonic at the Olympic Games. The description for Twinkle Circuit claims that this Action Stage must be completed before Sonic can access Twinkle Park. In reality, Twinkle Circuit is an optional Action Stage for Sonic.

A series of other children's books were written by Ladybird. These include two puzzle books, a coloring book and the picture books Robotnik's Oil and The Invisible Robotnik. Sonic the Story was a book explaining Sonic's transformation from brown to blue. Super Smash Bros. Series: A summarization of the Sonic series appearances in Super Smash Bros. Brawl, Super Smash Bros. for Nintendo 3DS and Wii U, and Super Smash Bros. Ultimate.