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.
- Directors
- Nobuhiro Kondo, Susumu Yamaguchi
- Writer
- Nobuhiro Kondo
- Released
- March 17, 2007
- Language
- Japanese
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