The Move Deleter is a character featured in all generations of "Pokémon" games, including Black and White, who deletes nearly any move that a Pokémon has learned. The Move Deleter is the only way for a Pokémon to forget a Hidden Machine move.
The Move Deleter in "Pokémon Black" and "Pokémon White" is located in Mistralton City in the house east of the Pokémon center. The Move Deleter can come in handy for various reasons in the Pokémon game series. For instance, when trading Pokémon in Black and White, the Pokémon cannot know any Hidden Machine moves. The Move Deleter's counterpart is the Move Reminder, which can teach a Pokémon any move it would have learned at a level up.