Mega Man Battle Network 4: Blue Moon Endless combinations of battle for extended replay - tournament structure allows players to draw lots of hours of fighting fun Customize Mega Man's powers by assembling program parts in a memory map Dark Soul chips offer Mega Man greater power -- but must be used carefully or Mega Man will switch to the dark side Fully Game Link compatible - Trade chips and programs, create Battle Network tournaments or connect Red Sun to Blue Moon for expanded storylines Collect the 6 souls in Red Sun and the other 6 souls in Blue Moon and then use them in the Soul Unison system - for devastating power moves