Idea #56 ^

Potential description: Yuki Judai or Judai Yuki, wants to be a Pro Duelist! He loves to duel and looks up to the King of Games. We all know him as the protagonist of Yugioh GX but what if there was an unexpected twist?

Long before he entered Duel Academy, he found something odd in the remnants of a lab that was destroyed in a fire. Something that would later change his life and maybe even change the story of GX.

Time to HENSHIN!

(TL;DR: Yugioh GX but what if Judai was a Kamen Rider...I have a problem but just stay with me)