Hardest bosses you ever fought

[ultra perfect cell]

Yeah, I agree. Stockman sucks. A neat little hint for the first arcade game with Stockman in his human form, keep killing the mousers. He'll run out and flee. I was playing a few days ago on my NES and yelled to the game the following words."HEY, FUCK YOU FUCKING REDNECK GREASEBALL PIECE OF SHIT! I OUGHTA RAPE YOU THROUGH THE FACE!" I hope you enjoyed that renacting moment.
Also, the first TMNT NES game was a bitch to beat. I got up to the turtle van level and no farther, but Shredder is a bitch to beat. He always has that move that turns you back into an ordinary turtle, taking one fucking life.