- Newbie Boom: As with Sonic Adventure 2, which was the first Sonic game to be released on a Nintendo console, this game was the first Sonic game to be released on Sony and Microsoft consoles.
- No Export for You: Re-released on the PlayStation Network in Europe and Japan, but not in North America.
- The Other Darrin: After Shun Yashiro's death the same year Heroes was being produced, Takashi Nagasako took over as Big the Cat from this game on.
- Real-Life Relative: Subverted in English with the Corkery family: son William voices Tails, while his father Bill and sister Emily respectively voice Chaotix members Espio and Charmy.
- Stillborn Franchise: Sonic Heroes was actually created to be a new independent Spin-Off franchise for the Sonic series much like the Sonic Adventure games ... but a weak PlayStation 2 port and a lack of support put a quick end to any ideas of following up with a sequel.
- Talking to Himself: Sonic and Metal Sonic are both voiced by Ryan Drummond and Junichi Kanemaru for English and Japanese, respectively.
- What Could Have Been:
- The game was going to be Sonic Adventure 3 but the idea was scrapped to not lure away or confuse newcomers of the franchise when they decided to port the games to new consoles.
- In 2018, the director of the game, Shiro Maekawa, tweeted the initial plan and roster. Team Sonic and Team Chaotix are identical, but Rouge was on the same team as Amy and Cream, Big was allied with Chaos and E-102 Gamma, and Heroes would have marked the first appearance of Fang, Bark, Bean, Mighty, and Ray in the modern era, the latter two being on the same team as Metal Sonic. Omega was likely a replacement for Gamma, and Shadow's resurrection was not planned at the time.
Trivia / Sonic Heroes