Klefki’s Lost Key is a late‑game, clue‑driven errand that hides its objective behind a few landmarks instead of a map marker. Here’s how to unlock it, where to pick it up, the exact battle court to search, and the payout for solving it.

Unlock requirements for Klefki’s Lost Key (Side Mission 106)

The request appears after progressing the story to Main Mission 35. Once you’ve returned from the Lysandre Lab and are back at Hotel Z, the side mission becomes available in your mission list.

Where to accept the request (Cadena’s location)

Open your side missions and track “Klefki’s Lost Key,” then speak to Cadena on North Boulevard in the Rouge District. She’s positioned across from Hotel Richissime. Cadena explains she visited a hair salon and a café, then used a nearby battle court — and somewhere along that path, her Klefki dropped a key.

Find the lost key (landmarks and route)

The game won’t pin a waypoint. Use Cadena’s hints: hair salon, café, battle court. The key is on a battle court in the Vert District, tucked off a side street near those businesses.

Landmarks that put you at the right court:

  • It’s near a hair salon and a café (Cafe Classe sits to the northwest).
  • It’s close to the Stone Emporium and the nearby Pokémon Center by Aymlis Park.
  • The court sits just off a side street; once inside, look for a small red sparkle on the ground.

Fast route from a common travel point:

  • Fast travel to the Pokémon Center just outside Aymlis Park.
  • Walk south, then turn left into the next alley/side street.
  • If you reach the Stone shop, you’ve gone a bit too far; back up to the previous side street.
  • Enter the battle court on the left. Interact with the shining red pickup on the ground to retrieve the fancy key.

Picking up the key triggers a short scene where Cadena arrives to thank you and wrap the request.

Rewards

Reward Quantity/Value Notes
Poké Dollars 5,000 Direct payout from Cadena
Nugget x1 Sells to shops for 5,000 Poké Dollars

Side mission details

Field Info
Mission ID Side Mission 106
Request name Klefki’s Lost Key
Giver Cadena
Where to accept North Boulevard, Rouge District (across from Hotel Richissime)
Prerequisite Available after Main Mission 35
Objective Recover the dropped key from the Vert District battle court near the salon and café; pick up the red sparkle

That’s the full loop: unlock the request after Main Mission 35, talk to Cadena on North Boulevard, grab the red sparkle inside the Vert District battle court by the salon and café, then collect your cash and Nugget.