Creator Backlash: According to Milton Knight, many of the staffers openly despised working on this show. Milton himself enjoyed working on it, but found the animation, writing and most of the voice acting to be quite shoddy.
Executive Meddling: Sonic Christmas Blast was originally intended to be titled An X-Tremely Sonic Christmas as a tie-in with the game Sonic Xtreme, but the game's cancellation forced it to be titled for Sonic 3-D Blast instead.
Dr. Robotnik was originally conceived as television's sexiest fat man. The animators weren't up to the challenge, but it didn't stop them from slipping in a lot of Shirtless Scenes and scenes that draw too much attention on Robotnik's rear end (and, of course, the completely unnecessary bikini pic from "Hero of the Year.")
Fake American: Everyone in the show except Sonic and Tails has a Canadian or British voice actor.
Hey, It's That Sound!: The episode "Grounder The Genius" features two of the actual sound effects from the Sonic gamesnote Thefirstthree in one part of one scene; specifically, the "jump" and "ring" sound effects.
There was a workprint of a pilot episode that was screened when the cartoon was being pitched to ABC. Unfortunately, the network hated it and instead preferred DIC's second idea of a Sonic-themed television series, ultimately leading to the pilot being scrapped. The workprint itself can be seen on YouTube.