Oh man, I remember these. That "if it sounds too good to be true, it's probably false" thing might just explain my extreme bitterness and cynicism.

I also remember a show called Sonic Underground, where Sonic and his brother and sister were princes/princesses and were looking for their mother to complete a prophecy. They also had magical medallions that would turn into instruments, allowing them to totally rock out whenever it was deemed necessary. It was probably awful, but I loved it as a kid. Any of this ringing a bell?