Underdog stars an actor.
MM4 may refer to  :. Mega Man 4 , a 1991 video game for the NES. Mega Man 4. Mega Man 4. Mega Man IV -LRB- Game Boy -RRB- , a 1994 video game for the Game Boy. MM4 -LRB- force field -RRB- , a class of force fields. MM4 -LRB- MMS -RRB- , a type of Multimedia Messaging Service interface. MM4 register , a CPU register used by the MMX extension. MM4 register. MM4 register. Might and Magic IV  : Clouds of Xeen , a 1992 video role-playing game in the Might and Magic series