(Story) Valor Lakefront Key Location – Pokémon (BDSP)

First you need to go to North part of Valor Lakefront through route 213.

Click Town Map option.

Enter this house to go to route 213.

Keep going on this route 213.

Select No when asked to choose another one?

Have a chat with the NPC next to the house at valor lakefront.

Now pick up the key (hidden item) from this location.

Put the suite key in your bag's Key items pocket.

Return the key to the NPC and talk to her inside the building to get A lava cookie.

Thanks for helping me out, Here's something for your trouble! You obtained a Laval cookie!