Chapter 4 of the game's Story Mode, titled Dr. Cossack's Robots! Friends or Foes...? is themed after the fourth Mega Man game. There are nine Deathmatch stages and two boss stages in the campaign. Dr. Light has been impressed by the amount of robots the protagonist has defeated, and continues to advise him/her/it to beware of any tricks Dr. Wily has planned and keep up the peace.