Your a liar. You don't just find a non existent pokemon from johto in pokemon black or white, and why would it be in dragonspiral tower? Lugia is not even a dragon type pokemon. If anything it would be an ice and water type. And whats more, a shadow lugia, really? i'm pretty sure you guys would be on a forum on the official website if you'd really found it, or even saw it. If you saw it at least you could prove it by showing your pokedex. *****.