Sergeant Keroro Chibi Kero: Secret of the Kero Ball!?
2007
Tells of the adventures of a young Keroro and Giroro back on Keron when they get trapped inside a prototype Kero ball.
Director: Nobuhiro Kondo, Susumu Yamaguchi
Writers: Nobuhiro Kondo
Where to watch
Not available on streaming in your region.
