Madan Keys are magic keys that allows Ryukendo, Ryuguno and Ryujinno to use them to summon weapons, JuOhs or use their finishing moves to finish off an enemy. When "Kenji" inserts the RyuKen Key into GekiRyuKen, he synchronize with GekiRyuKen to transform into Ryukendo. His Transformation call is "GekiRyu Transform!". By inserting the Final Key into GekiRyuKen, Ryukendo can performing his finishing attack. The Knuckle Key summon out the Madan Knuckle and it's finishing move is Madan Spark.