From Bulbapedia, the community-driven Pokémon encyclopedia.
Shadow Bolt is one of several Shadow moves available only in Pokémon XD: Gale of Darkness. Like other Shadow Moves, it is forgotten and replaced with another move once the Pokémon is purified.
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As Shadow Pokémon cannot be traded, and since Pokémon Contests do not exist in Pokémon XD: Gale of Darkness, Shadow Bolt cannot be used in Contests.
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