Hyun is the creator of the Rock Hard Gladiator known as Yoyo (Eric Kwon) Hyun is also the founder of Hyun's Dojo and uses a light purple stick with a party hat to represent himself along with Yoyo His YouTube channel animation can be found here: hyun's anims His RHG, Yoyo has iconic enough that he was featured in a cameo in Stickman can't fight.