|This article is about a/an Rock Crimson in Madan Senki Ryukendo.|
Rock Crimson is a warrior who transforms into a massive ball of stone when angry. He has an old friend of Dr. Worm. He has amazing raw power, but gets set off if anybody calls him "idiot". He was broken into pieces by Ryukendo's Twin Edge GekiRyuKen, only to be revived later by Dr. Worm with Lady Gold's help, giving him a stone that allows Rock Crimson to regenerate even after he's blow to bits. It took a team effort and Fire Ryukendo with the Twin Edge GekiRyuKen to destroy RockCrimson. But using the Power Spot's magic, Rock Crimson was revived, though defeated by the three Maden Warriors before Dr. Worm took RockCrimson's remains to rebuilt him. Rock Crimson was revealed to have Kenji's Ultimate Key in his body, unwillingly creating Ultimate Ryukendo, who defeated him once and for all.