How to Get Rotom - Pokémon BDSP

Rotom can be found at night in the old chateau if you have the national Pokedex.

Get inside the old Chateau.

Go up the stairs and through the door in the middle.

Go into the second room on the left.

To start the battle with Rotom, interact with the TV.

Rotom is at level 15. Don't use high level Pokemon.

The Rotom is immune to the false swipe attack because of its ghost type.

When night falls, interacting with the TV will offer you a prompt to thump the TV.

If you visit the old chateau at noon, you won't be able to see Rotom.

After you catch Rotom, you'll pick up a secret key to open the Rotom room. There, you can change Rotom's form.

You have the secret key. It's time to go to the Galactic building in Eterna City.

On the first floor of the building, go to the back left corner of the room adjacent to the bookshelves.

A door will appear and you'll have access to the appliances that Rotom can change into.

Different appliances can be added to the Rotom Catalog.