Crayon Shin-chan: Gekitotsu! Rakugaki Kingdom to Hobo Yonin no Yuusha

映画クレヨンしんちゃん 激突! ラクガキングダムとほぼ四人の勇者

Due to the advent of modern technology, kids have abandoned their crayons and paper for electronic tablets, causing the imaginative energy emitted from children's doodles to reach an all-time low. Consequently, the Rakuga Kingdom in the sky, powered by such energy, is now at risk of collapsing onto the cities below. For any hope to avoid such a catastrophe, the kingdom's princess hastily seeks out a hero from Earth capable of wielding the "Miracle Crayon." While the kingdom's reformers arrive on land to seize Earth, the magical crayon finds itself in the hands of Shinnosuke "Shin-chan" Nohara. In a journey that will test the limits of childlike imagination, Shin-chan must harness his creativity to secure the safety of his home and restore peace to both worlds.

(Source: MAL Rewrite)