Time Bokan Series: Itadakiman

In the year 20XX, Oshaka School in Kamakuland is an elite institution reserved for descendants of Priest Sanzo's clan. A trio of antagonists believe themselves to be legitimate heirs but have uncertain lineage. Despite repeated failures, they strive to gain admission. Meanwhile, three students are summoned by the principal and tasked with retrieving scattered puzzle copperplates to complete a board, as instructed by Shakyamuni. The villains overhear this mission and attempt to intercept the students. They recruit a clever boy named Koochan to help them steal the copperplates from a goblin, trying to ally with the goblin to oppose the heroes. Koochan, realizing their plan, transforms into Itadakiman and fights to stop the trio.