knuckles was sonic's rival in:
the television show (Sonic Underground)
the comic book (until knuckles got HIS OWN **** COMIC BOOK WHICH SHADOW WILL NEVER HAVE...plus, i own a copy)
sonic 3D
sonic the Hedgehog 3
Sonic and Knuckles
Knuckles Chaotix
Sonic Adventure (1st one...dreamcast FTW)
Sonic the movie
also, he's an echidna, not ANOTHER hedgehog. i mean, SRSLY, VARIETY plz??? amy, cream, that alligator and everyone else is another animal, wassup with shadow? what a poser. plus, hasn't an evil hedgehog already been done before? anyone remember sonic R? there was metal sonic.
not to mention knuckles GUARDS the master emerald. that's even more badass than sonic himself.
so there, i'm pretty sure that arguement is closed. i grew up on sonic and megaman, many of us did...guess wut? is too young. he's also too ******** anyway >.>