Zatch Bell!

The story in this one-shot takes place sometime after the original ending, and focuses on Gash's feelings towards his current life as the Demon​ King, and also on his deep bond with Kiyomaro. It was made to commemorate the 10th-anniversary reprint of the Konjiki no Gash!! manga in a smaller format (bunkouban) with more chapters per volume than the regular tankoubon.

The sequel to *Zatch Bell!* 100 demon children fought to determine the new king of the demon world. Once the war ended, the new king was crowned, and the demon world was at peace… or so you thought! The shocking reality of the current-day demon world is now revealed—and deep in the maw of despair, three demon children make a dangerous gambit. (Source: Birgdin Board, translated)

A comedy-focused spin-off of the main Konjiki no Gash series, serialized in Coro Coro Comics between May 2003 and April 2006.

Kiyo is a brilliant junior high student whose inflated ego (and tendency to blow the grading curve) has made him a major target for teasing at school. So his father sends him a bizarre birthday present – a strange little boy named Zatch Bell – to help him make friends and reform his bad attitude. Zatch brings with him a mysterious red volume of spells, and Kiyo discovers that Zatch has magic powers that are unleashed by reading from the book! But there are more surprises to come, and Kiyo's destiny is about to change forever! (Source: VIZ Media) *Note: The chapter count includes the bonus chapter “The Two Queens”, as well as 16 “Gash Café” chapters.*

In a world of animals where the strong eat the weak, Monoko the tanuki stumbles across a strange creature the likes of which has never been seen before—a human baby! While the newborn has no claws or teeth to protect itself, it does have the rare ability to speak to and understand all the different animals. Can Monoko and the baby team up to protect the tanuki pack from vicious wildcats? (Source: Kodansha USA)