Shadow Lugia is the mascot and main, non-human antagonist of the GameCube software, Pokémon XD: Gale of Darkness.
Shadow Lugia is a dark purple, almost black version of its good counterpart. The spikes around its eyes are silver and jagged, while its eyes are red with a pale circle for its iris. Its wing fingers are often incorrectly shown as having points or claws, and its feet have three pointed toes. The fins/spikes on its back are tipped pentagonally with no base, like a tombstone. The marking on its stomach is a lighter color than its body.
Role in the game
Unlike other Pokémon games, this one contains a different kind of Pokémon other than shinies. They are called Shadow Pokémon. The most well-known Shadow Pokémon is the main mascot of the game, Shadow Lugia. At a certain point in the game, the player will receive an Aura Reader, allowing the player to identify Shadow Pokémon, and the player will need to purify the Pokémon. It is believed it's impossible to purify Shadow Lugia because of its power. After battling this Pokémon, the player can now purify Shadow Lugia, causing it to transform into normal Lugia.
Super Smash Bros. for Nintendo 3DS/Wii U
While Shadow Lugia itself does appear in any capacity of either versions of the game, one of Mewtwo's alternative costumes resembles the color scheme of Shadow Lugia.