Rubber Man, Block Man, a boss where he attacks with all of the neverending Mega Man sequels. He'd be called Mega Man Man.

Beerman who would have terrible aim

ANTI-MAN! hes a black mega man that has wierd powers. kinds like samus and dark samus!

Mail Man!

He throws very sharp envelops!

what about something along the lines of Plankman? he could look all pirate-y, and could throw boards at you that squash you against the walls. and then if you beat him, you get the ability to make these boards you can use as platforms.

Plank Man sounds pretty cool!

I laughed so hard I had tears when I read this. Thanks Fox!

Mega Man. The ultimate boss in any Mega Man game

Hmmm, how about Candy Man? He attacks with cavity inducing candies at you, which will send you to Dentist Man.

Nintendo Man he would throw nes games at you

Emo Man. He sits in the corner and slits his wrists until he dies.

His special power is Instant Suicide, makes Mega Man explode when the attack button is pressed.

Glue Man
He shoots glue blobs that stick you to the floor before he runs into you.
You get the power to shoot glue blobs that stop enemies from moving and shooting, and make aerial enemies crash.

That's actually a pretty cool concept. You could glue your enemies against the wall and use them to get on high ledges.

Calculator Man he tallies up your death count while trying to navigate his stage

@Rensch
I never thought of it that way. That's a great idea. I'm working on a Mega Man hack and may put in glue man. It's going to be hard though .

It's really hard to think of something incredibly lame or something that's already done but what about Atomic Man? I personally like every fire themed boss in the series so another wouldn't hurt.

StupidnameMan...I think that's been done though.
_{Please don't throw things at me.}

How about Capcom Man? When you get close to beating him, he will program you out of the game and call it a game over

SalaryMan: will do the level for you for 20 screws

Fatman. He'll do a bellyflop on you and throw food at you!