
Quick answer — Shun Matsuena worked on Kenichi: The Mightiest Disciple (Original Creator), Kenichi: The Mightiest Disciple: The Attack of Darkness (Original Creator).
Shun Matsuena worked on Kenichi: The Mightiest Disciple (Original Creator), Kenichi: The Mightiest Disciple: The Attack of Darkness (Original Creator).