I went ahead and compared all 3 Versions of Shadow (SilentDoom's old one used Mastaklo's but the red outfit had better textures) and the first 2 are from the Lord of Chaos PSA http://forums.kc-mm.com/Gallery/BrawlView.php?Number=19022 while the other 3 (02,04 and 05) are from Mastaklo's Shadow http://forums.kc-mm.com/Gallery/BrawlView.php?Number=2369
Alright, I compared the models and textures of both hacks. I can't delete his Shadow re-texture because he did make changes to the texture files, and permission to make recolors is not needed, as stated in the Brawl Vault rules.
Now, about this: http://forums.kc-mm.com/Gallery/BrawlView.php?Number=35938
Do you have proof this is plagiarized, aside from its moot previews?