In a world where humans and Mechanimals coexist, Nachan and his friends of Mechanimals and tamers encounter exciting battles.

This is a world where humans and mecanimals coexist. Nachan is an ordinary 5th grader who isn't great at mecanimal battles and has no other special ability. One day, he starts to tame Evan, a mystical legend mecanimal. When all legendary mecanimals are gathered, something special will happen...Nachan becomes friends with many tamers as he tames even more mecanimals. He hears the news about mechanical championship competition to be held at his town. Here come the thrilling battles of mecanimals and tamers.—CHOIROCK

A WORLD WHEN HUMAN AND MECARDIMAL COEXIST.An ordinary elementary school student "Jason" finds a worn-out map in a basement and then happens to catch a novel Mecardimals named "Evan". Evan is one of the Legend Mecardimals from very early times. In the hidden legendary story, not only were they very strong but also something special would happen when all of them got together. Jason evolves his skills by catching more Mecardimals and becoming a friend of other Tamers. One day, during a Mecardimals battle, the last year's champion "Kane" visits the venue, and Jason gets the opportunity to have a match against him. Jason plays a good battle with Evan, giving a strong impression to Kane. After that, Kane decides to get the Legend Mecardimals. But he fails to obtain them a bunch of times and becomes jealous of Jason getting stronger unlike himself. That's why he ends up bracing himself to be involved with the evil force due to a strong desire to be stronger.—RTV

"Mechanimal? What's that?" Mechanimals were forgotten by people. The evil shadow gang is aiming for the legendary Mechanimal and now, only Nachan and friends can protect the legendary Mechanimal against them. Will we be able to bring back a peaceful with Mechanimals? An exciting battle between Mechanimals and Tamers begins.—The Mecardimal Database

This is a world where humans and Mechanimals coexist. Kai, a fifth-grade boy in elementary school, is a normal boy who is not good at Mechanimal battles and has no special skills. One day, Kai happens to be taming the mystical Legend Mechanimal, Evan. There's something special happening when not only Evan but also the Legend Mechanimals... Kai is making friends with many tamers and taming more Mechanimals. The exciting battle of Mechanimals and tamers begins.—Anime-Planet