Kerokero Keroppi no Daibouken
Hello Kitty and Friends: The Big Adventure ／ Kero Kero Keroppi no Dai Bouken ／ Kerokeroppi: The Big Adventure Mystery of the Bellybutton ／ Keroppi and Friends: The Big Adventure ／ Keroppi in the Big Adventure ／ けろけろけろっぴの大冒険
Description
When Pocapon's belly button gone missing, Keroppi, Den Den, and Ruby go to find it as without it he is unable to play the drums.