Board Thread:General Discussion/@comment-24553409-20140429164602/@comment-15588403-20140430031344

Sally Acorn is an official Character, She's mostly known for the cartoons but she was entered as a sprite character in some of the early Sonic Games, known as "Ricky". She is in the bonus stages of Sonic pin ball, and was supposedly to make in appearance in Sonic-16 and Sonic Mars.

She is an official Sega Character Now owned by Archie. Still Official None the less.

Source: http://info.sonicretro.org/Princess_Sally