As a last ditch effort, Madrox's abilities can be used to deadly effect, which were used in self-defense against Seamus Mellencamp in X-Factor #92 (July 1993), when Madrox jammed his hand into Mellencamp's mouth and activated his power, creating duplicates inside Mellencamp and exploding him from the inside out.
Couldn't he do this to the hulk. 😄
MM's powers are so cool. Lets take a look at this, and see if any of this makes sense.
MM has sent out many dupes across the world to learn as much as he could. (If he wanted to he could be a semi-realistic Batman *in HOW he learned it. One man learning 127 martial arts and everything under the sun? yea right* )
Now he has learned some MA, he absorbs KE (one good example was the recent Cyclops optic blast creating many dupes), he is more than just one man. He has unlimited stamina (creative use of his powers. Create a dupe and then just absorb him. His stamina goes back up)
However, Hulk is the strongest one there is. He can easily take on 1000 normal men. Men who can take and absorb kinetic energy? He could rip them apart. How many can he rip while creating more by "smashing"? He has unlimited stamina for all intents and purposes and can go as long as the energize bunny can beat the drum.
Final conclusion? Stalemate, unless MM can find some sort of weapon that he can use is found and then duplicated among them.