on naruto ultimate ninja 4,to unlock yondaime hokage/yellow flah/narutos dad,you have to beat hero mode.thats the mode where u play through narutos past,2 get further you have 2 find piece of memorys,you find those in story mode/master mode.at the end of hero mode u have to have special pieces of memory.after u find those,go to hero mode and use them and after your done,the screen will say "you have unlocked the yellow flash.