FUUUUUUUU I can see why I gave up on playing Sonic 4, this boss is just... WHAT DO YOU WANT FROM ME!?!
1) does the sonic 2 boss thing, okay, I can deal with this.
2) gets shield around him, so after a ton of dying, I realise you need to get the claw first, ok, yeah I can see this is reasonable, just about.
3) makes THE ENTIRE FLOOR DISAPPEAR so you fall to your death.
WHAT. WHAT DO YOU WANT!?!?!? I CAN'T FLY!!! FUCK YOU DR ROBOTNIK!! FUCK. YOU.
not to mention that it takes forever to even get to this point and sometimes I don't even make it, so I have to do it over and over and over AND OVER AND OVER AND OVER AND FUUUUUUUUUUUUUUUUUUUU
edit:
beat it and I never, ever will, ever again, what a load of shit, honestly, how can this be fun for anyone D: