the sprites are free to use, but give credit (even if you remix the project) --- what did i say, i WOULD make the S4, well at least half of them. (all that's left is mask and skull) (woop woop i can make headgear now :D)
credit to nintendo, corocoro and @waaaa24 aloha was TOTALLY a piece of cake, especially making his gear... nah... i'm lying when i say that