here is the proof:
http://clubpenguin.wikia.com/wiki/File:Desafio_Ninja_Sombra!
http://clubpenguin.wikia.com/wiki/File:Happy_S_2.png
http://clubpenguin.wikia.com/wiki/File:Shadow_ninja_void_wave!.jpg
http://clubpenguin.wikia.com/wiki/File:Shadow_ninja_cloud!.jpg
http://clubpenguin.wikia.com/wiki/File:Screenshot_at_Feb_17_22-16-14.png
http://clubpenguin.wikia.com/wiki/File:CJ_Shadow_Proof.PNG
http://clubpenguin.wikia.com/wiki/File:Shadow_ninjas_exist_TRUE.png
http://clubpenguin.wikia.com/wiki/File:Screenshot_from_2013-05-27_11:50:52.png
http://clubpenguin.wikia.com/wiki/File:Download.jpg
so which one is the real gem?