This guide shows where to find the ‘Suite Key’ in Pokemon Brilliant Diamond & Shining Pearl (BDSP). It is required for a mini side activity in the Valor Lakefront
How to get Suite Key
You will get this activity by talking to an NPC in Valor Lakefront. You will find the NPC standing outside a building near ‘Seven Stars Restaurant’ in the Valor Lakefront (See the picture below for the location of the NPC). Talk to her and she will tell you that she has lost her ‘Suite Key’ and cannot enter the building.
After talking to her, take the path in the south direction as shown in the picture below. Go south until you reach the Valor Lakefront reception building. Don’t enter the building. The Suite Key is on the left side outside the building as shown below. The ‘Suite Key’ is completely invisible. Stand at the location as shown in the second picture below, and pres ‘A’ to pick up the key. You might have to try a few times to get the key, as it is invisible.
Once you have the key, go and give it to the NPC. She will then open the door and go inside the building. Enter the building and talk to her again to receive a ‘Lava Cookie’. ‘Lava Cookie’ can be used once to heal all the status conditions of a Pokemon.