Hanakappa: Hana-sake! Pakkaan♪ Chou no Kuni no Daibouken

In the film, butterfly warriors suddenly appear in Yamabiko and snatch away Hana Kappa's mother and others. Hana Kappa and his friends head out towards the mystery-filled land of butterflies. They overcome obstacles such as mountains and deserts and along the way, encounter a mysterious boy named Poru.

(Source: Anime News Network)