Sumeba Miyako no Cosmos-sou (4) Saigo no Dokkoi

is the fourth volume of the Dokkoida?! light novel series, written by Taro Achi and Illustrated by Sumi Miya. It was released under the Dengeki Bunko Imprint in July 2000.

Synopsis
Hi, I'm Suzuo Sakurasaki, who is still aiming to be a childcare worker while also doing a laughing hero, Dokkoida. It's finally time for the final battle with space criminals. After all, the super-A space criminal Sweet Pea came to Earth and made flowers grow from everyone's heads, and Asaka became sweet potatoes ... But in such a pinch, Maron Flower, Edel, and Hyacinth may help and possibly save the crisis on this planet! Alright, I'll decide coolly at the end. Let's go, makeover Dokkoida !!

(source: Bookwalker JP - Translated)