Ryu So Cool! To harness the power of the Ryusouls, the Ryusoulgers are equipped with the Ryusoul Changer, a red Tyrannosaurus shaped changer. A transformation Ryusoul is inserted into the back of the head, and the knight visor rotated from the jaw of the dinosaur to the top of the dinosaur to initiate the transformation. The red button on the Changer can also be pressed for Kishiryu summoning sounds. Included is the Red Ryusoul, used by Ryusoul Red to transform. It has a slightly different set of rails than the one included with DX Kishiryu-Oh and thus makes slightly different sounds in the DX Ryusoul Changer and DX RyusoulKen toys.