have to buy this game!!!! and how to unlock the yellow flash
how to unlock the yellow flash:
to unlock the yellow flash, you have to unlock all other character first including the first and second hokage, hanabi hyuga and konohamaru.
to unlock konohamaru, first and second hokage you to do moegi and udon trivia.
after you've done moegi and udon's trivia, go to suzuki estate an do ebisu's trivia.
to unlock hanabi you just have to date her by buying her a "parfume set" and "pricey parfume set"
after you've unlock konohamaru, first and second hokage and hanabi there's this bubble thing say "congratulation you have unlock all the character" and for a bonus of your hard work you can use the yelow flash as playable character.
note: all of those above is just for RPG mode and to unlock the rest o the character you have to complete hero's story