Crayon Shin-chan Puri Puri Purin is a pudding mold that includes many familiar shapes from the anime and manga but the centerpiece is the rear end of Shin-chan, a rebellious child known for his ass dance. For added authenticity, you can accessorize your butt with a candy thong and chocolate mud butt toppings (not included).
Find this (figuratively) tasteless pudding at Amazon Japan or Marimo Marshmallow Store. Don’t forget to buy some Toilet Candy to wash down your butt pudding!