Knuckles in Sonic the Hedgehog 2 - Full No Commentary Playthrough

I had already beaten Sonic 2 a bunch of times, declaring it as my favorite Sonic game at the time when I found out about Sonic & Knuckles and injecting Knuckles into a couple of the previous Sonic games. Even though all the levels were the same, having Knuckles is and was enough to warrant another playthough for me.