Well, Sally does make an appearance in Sonic Spinball... for a секунда every bonus stage if Ты free her from a roboticizer. So, she actually is in a Sonic game already. Tee hee.
yes, it would be nice to put Sally in Sonic The Hedgehog, Sonic Adventure DX, Sonic Adventure 2, Sonic Riders, Sonic Generations, Sonic Colours, Sonic Black Knight, and in all videogames