Chibi Kero: Secret of the Kero Ball!?

A young Keroro tries to impress Pururu by showing off the Kero Ball, a ball borrowed by Giroro from his brother Garuru. While testing the buttons, he accidentally transports the 4 tadpoles inside the ball. To get out, they must win the pinball maze. In the outside world, a young blue tadpole Kururu picks up the ball and hears the cries of help. He makes a deal to free those trapped inside if he ge...