He is a red echidna.
Not on it's own, no. You can lock Sonic 3 onto Sonic and Knuckles and play as Knuckles through both games, though.
Knuckles is 15 or 16 in sonic x and games
knuckles in sonic two, blue sphere, sonic 3 and knuckles, flickey and ristar.
"Knuckles Chaotix". Even though "Sonic 3" and "Sonic and Knuckles" were two separate games for the Sega Genesis, but the were both in the same story line. It started in "Sonic 3" and then continued in "Sonic and Knuckles". Knuckles Chaotix for the 32x, is his second game.
sonic 1, sonic 2, sonic 3, sonic and knuckles, blue sphere, knuckles in sonic 2, sonic 3 and knuckles, sonic 3d blast, sonic spinball, dr. robotnik's mean bean machine, flicky, and ristar.
You can play them in the Sonic Mega Collection Games, but not in Sonic Gems:i can go super sonic says:but you need to unlock sonic 3 and knuckles that's what i had to do!
sonic the hedgehog 1,2 and 3. sonic cd knuckles' chaotix
sonic tails knuckles
He uses it for holding onto walls, and in later games, for digging and punching.
You can only get Knuckles in Sonic 2 if you stack Sonic 2 and Sonic and Knuckles on the Genesis. Otherwise Knuckles cannot be played in the game.
There are many ways. But, since I'm ahardcore player at Sonic, I don't know any specific ways to unlock them. I just played Sonic 1, 2, 3, and Sonic and Knuckles. Play nonstop on these games, and you'll unlock: 1. Knuckles in Sonic 2 2. Sonic 3 and Knuckles 3. Blue Sphere 4. I'm not sure, but maybe Knuckles in Sonic 1 Hope this helps all Sonic fans!
Yes except in sonic 3 and knuckles, you can be knuckles. :)