"From Kamen Rider Black RX"

Shadow Beast:
http://i231.photobucket.com/albums/.....hadowBeast.jpg

A blue monster who can shapeshift and transform into a shadow. He attacked Joe when he was with an old friend of his named Sarah to obtain her necklace and ended up injuring Joe. Luckily, Kotaro transformed into Kamen Rider Black RX to battle Shadow Beast. Kamen Rider Black RX got them to safety in Ridron which also tackled Shadow Beast. Shadow Beast later captured Sarah. When Joe and Kotaro found her in an abandoned warehouse, they were ambushed by Shadow Beast and the Chaps. Kotaro transfomed into Kamen Rider Black RX and fought him. When Shadow Beast swiped the necklace, Kamen Rider Black RX became Bio Rider and followed Shadow Beast outside. Bio Rider took back the necklace. Bio Rider called forth his Bio Blade to cut off Shadow Beast's antennaes and then kill him with it before getting Joe and Sarah out of the warehouse before the bomb planted by Gedorian blew it up.

©Toei