I3LuEI3omI3eR on 21 February 2015
Many come to mind.
Ironically like the OP said, the Wily Capsole in his final form in Mega Man VII was one of the Hardest Boss battles I've ever experienced. I almost gave up thinking how is it possible to beat this fucker...
Captain K. ROOL from Donkey Kong Country 2 (2nd Fight after completing the Lost World).
Jaws from Goldeneye 007 in 00 Agent difficulty (Holding TWO M16 Rifles o.O)
Krauser (Evil Guile) from Resident Evil 4
This FUCKER (Gill) from Street Fighter 3 (Resurrection = cheeziest shit ever).
Dracula (3rd form) from Castlevania: Dracula X Chronicles (Spawn wannabe)
And finally the cheeziest and hardest boss I ever faced in gaming...
Sephiroth (Kingdom Hearts)
this meme says it all
