If you're looking for manga similar to Medarot, you might like these titles.
A boy named Enta is invited to come to the Battle Frontier by Scott. Once there, Enta decides to battle each of the Frontier Brains.
The manga follows the adventures of battle genius Katsuya, Pokémon collector Soro, survival expert Toki, and their Pokémon as they accept missions, go through different challenges, and help many people and Pokémon.
When something begins gnawing on the wiring in his house, ten-year-old Ash Ketchum discovers his first Pokmon: Pikachu. Ash sets out to become the world's greatest Pokmon trainer, and to do so, he and Pikachu must brave a series of adventures. For newcomers and old pros alike, the comic helps explain the complex world of Pokmon.
Enzi Hikigane may seem like a rough-and-tumble protagonist but he is an exceptionally-skilled B-Der that uses his elusive custom-made Spike=Phoenix to earn a livelihood in the bustling city. One day, he meets Hajime Tamauchi, an average joe whose interest in B-Daman started after watching Enzi's B-damanccentric tricks of the trade. The series follows the daily life of Enzi and Hajime as they bid their way to be the best B-Ders and also to fend off those who are trying to capture the elusive Phoenix.
Koya Marino hasn't set foot in the Tobita Club for a long time - not since when his older brother, champion Crush Gear Fighter Yuya Marino passed away four years ago. But when the C.G. club his brother was once part of is threatened with extinction from a rival team set up by the Mangajin Corporation, it is up to Koya to restore the Tobita club to its former glory, using no less than Yuya's prized Crush Gear - the Garuda Eagle!! The spirited Crush Gear fight is about to begin!
Masaru Mahha loves everything about Gear Fighting, and together with Garuda Phoenix, he has succeeded in defeating all his opponents... all except Yuu Akusawa, a professional gear fighter! It's time for the new generation of fighters to enter the coliseum, so start your engines and burn rubber!