Shadow Lugia is a legendary Pokemon from Pokemon XD. Originally an ordinary Lugia, it was captured by the evil syndicate of the Orre region named Cipher as its ultimate shadow Pokemon and claimed to be unable to be purified due to essentially having its "Heart closed". This was thanks to one of Cipher's admins Lovrina, soon given the codename XD001. It was used in one of their schemes to capture a cargo ship of exotic Pokemon for Cipher to convert as tools and presently serves as the loyal Pokemon of Cipher's grandmaster Greevil.

It's appearance is that of a normal Lugia however with darker colors, the body being purple with the belly, eye markings, back and tail fins being gray. It's eyes are red with white ringed pupils.

It's power differs from a basic Lugia, it's attacks being corrupted by its shadow-fied state, the attacks ranging from conjuring dark twisters of purple energy with Shadow Storm, a distorted aerial beam of Shadow Blast and having strong telepathic power to lift entire large vessels.