"Koinobori...?!" (こいのぼり…!? Koinobori…!?) is a special bonus story for Dragon Ball SD.
Since the Boys' Festival is coming up, Bulma explains the tradition of koinobori (fish-shaped banners flown from the roof of a house with a male child). Goku naturally wants to know if you can eat it, which annoys Bulma. The next day, however, Goku calls Bulma over to show her his koinobori… an edible one made of real fish impaled on Goku's Nyoibō. A freaked-out Bulma shouts that this sort of thing isn't koinobori at all.