Finished the game. The final boss was legit except that team members are taken away every phase and the final phase is with Bubble Man. Thankfully, I have a secret weapon handy. Also, phase 2 is hard without said secret weapon. I also do phase 7 with the same weapon. I did not do phase 6 with it since Air Man has an upwards attack.
Also, there are no boss re-fights for Wily levels 4, 5 and 6. However, it makes sense since 4 is just a series of big gauntlets, while 5 and 6 are just short levels that lead straight to the boss.
That reminds me, Wily Fortress 4 is so legit. I like how "Break Man"(Proto Man) helps out in the Crash Man themed gauntlet. I did not do the Heat Man themed gauntlet with Heat Man since it is just a series of fire shooters. I did with Bubble Man since he can extinguish fire. As for the others, I find out who is it based on and did it with them. e.x.: I did the Quick Man themed gauntlet as Quick Man.