Collection: Sonic Boom

Despite being synonymous with the "edgy" 2000s era of the Sonic franchise that Sonic Frontiers hearkens back to, Shadow the Hedgehog is completely absent from the game. No official comment has been expressed on why Shadow is omitted, however, a month before Frontiers' launch, the game's writer Ian Flynn would quote retweet a screenshot of an interview with writers for the Sonic Boom cartoon claiming that Sega are restrictive on Shadow's portrayal to the point where it's preferable to omit him in spite of his fan-favorite status than work with Sega's restrictions, with the caption "[quote-retweeted] without comment".

Sticks the Badger from the Sonic Boom sub-series resembles Aika from Skies of Arcadia, another Sega game. Both Sticks and Aika use a boomerang as their weapon of choice, have nearly identical hairstyles and have orange as one of the predominant colors in their design.