Not sure what specific part you're referring to, as the entire event leads up to that (hopefully, based on the decisions you've made), but regardless, the guide will tell you everything you need to know.
Guide: https://rodablackfang.itch.io/monster-village-vn/devlog/799985/chapter-3-guide-s...
Umm... I think there's two things I need to tell you.
First, I'm not the dev, so there's no need to respond to me about continuing the story.
And second, your comment contains enough spoilers to run the entire length of all eight worlds in New Super Mario Bros. Wii. I hope you can edit your comment so that no one can see that.
