The Princess Sally Miniseries. Ironically, an Archie-Cannon character was the first to get their own mini-series spun off of the Sonic books.
It might not be surprising though, as the Princess was a well designed and charismatic character that drew in fans. It was her ability to out-shine Sonic himself, that frightented some!

The art in all 3 books was nice and consistent. There weren't any horrible scenes, badly done pannels, or atrocious character design. If you enjoy the style, all 3 books will impress. They really appear as a nice effort with a witty enough plot and good planning all around.

The main "Mystery Point" was their only faux-pas, in that it involved a fake Sally in a purple vest. The purple vest looked like another of their Inking Errors, which were fairly common, and so was dismissed rather then "Cleverly caught onto" as they had intented for fans to do.

Because it's not Sonic, it's not easy to get a hold of this mini-series. Expect high prices where you do find it.