Paul is a young boy whose friend Nina is kidnapped by Belt Satan, the demonic ruler of another world. He daringly goes on a mission to rescue his friend. Pakkun, a plush doll with magic powers, aids him as they plunge into Belt Satan's dimension of living toys. Paul's journey is beset by many difficulties, but he also encounters a variety of delightful wonders.
 
(Source: Anime News Network)

The excessive adventure begins when a mysterious flying life-form, UBO came to "Tatsunoko Anime World Island" where all the Tatsunoko animation characters live. TV special animation program featuring all-star Tatsunoko characters. 
 
(Source: Official Website)