anime/manga series had video games, most of which were published in Japan only.

video games were only published in Japan with half of them being Game Boy Advance titles but three games were localized in North America including Zatch Bell!

Yūjō no Zakeru 2 was planned to be localized in North America as Zatch Bell!

Electric Arena 2 but it was canceled for unknown reasons.

Bell anime franchise is very popular worldwide, the vast majority of Japanese video games based on this series are never officially released outside of Asia.