Sergeant Keroro Chibi Kero: Secret of the Kero Ball!?
Movie| Title | ちびケロ ケロボールの秘密!? |
| User score | 0 |
| Release date | Mar 17, 2007 |
| Genre | |
| Director | Nobuhiro Kondo , Susumu Yamaguchi |
| Production country | Japan |
Tells of the adventures of a young Keroro and Giroro back on Keron when they get trapped inside a prototype Kero ball.