The series was broadcast on Fuji TV and other FNS stations across Japan from October 3, 1976, to September 11, 1977, and lasted 50 half-hour episodes.

[1] The series director was Hiroshi Sasagawa, of Speed Racer and Tokimeki Tonight fame.

While Pakkun appears to be a fairly ordinary stuffed toy, he in reality is the keeper of the portal between Earth and an alternate dimension known as the Land of Wonders.

After making an unsuccessful attempt to save Nina, Paul and Pakkun are forced to return home to Earth, where Paul is confronted by Nina's parents, who blame him for her disappearance and accuse him of murdering her.

Paul returns to the Land of Wonders with Pakkun and Nina's dog Doppe in tow, fighting monsters with his powerful yo-yo in order to defeat Belt Satan and save Nina.