The Move Deleter is located in a house on the north side of Lilycove City. You can access this house as soon as you reach Lilycove.
Location
Step 1: From Lilycove City’s Pokémon Center, turn right and climb up the nearby staircase.
Step 2: When you reach the top of these stairs, look for the Move Deleter’s house directly to your right. It will be located immediately to the right of the Lilycove Department Store and you should see a signpost near his house as well.
Step 3: Once inside, you’ll find the Move Deleter standing near his TV. Speak with him whenever you want to delete a move from a Pokémon in your party.
NPC Mechanics
As his name suggests, the Move Deleter enables you to erase moves from your Pokémon’s moveset.
Since most moves can be overwritten when your Pokémon tries to learn a new move by leveling up or by TM, you probably won’t need his services all that much.
But if you want to remove HM moves, then you’ll need to use the Move Deleter NPC. Because HMs aren’t replaceable by other moves, so they can only be forgotten via the Move Deleter.
If you want to delete a move, simply talk to him and choose the Pokémon with the move you want to erase. Then select the move to be deleted.
Just remember that some moves can only be relearned from the Move Reminder or by spending Battle Points (BP) with the Move Tutor, so think carefully before erasing a move that you can’t teach again with a TM!
