Dead or Alive 5

There seems to be some confusion over this one...I can confirm it does NOT have to be separate people....just separate invites. I also had major problems with 'player cannot fight now' or something like that. Guaranteed way-go into TRAINING,obviously have throw drowns on accept then just press back when a red envelope symbol appears in bottom right corner. You can boost this with a friend however achievement only counts for the person accepting the invite so you would have to do 100 to return the favour