Eevee Sticker Sidequest

After defeating Zero and the PULSE Clawitzer, the player will encounter a code displayed on the monitors as they descend back down to street level. The code reads "2368". Traveling to the building in Labradorra City's southeast corner, the code can be used to open a security locker, allowing the player to obtain the Swampertite.
There is however a second, secret code. Rearranging the code to read "3862" will unlock the second security locker, where the player can obtain a Sylveon.
Sylveon will always be female, and has the Egg Move and the Tutor Move in its moveset.. Her Original Trainer will also be listed as "Edie". Additionally, she will be holding a unique item, the Ribbon Collar. The Collar will have an address on it: "Willowreed and Crystal, 2". 
In the Jasper Ward, an apartment building can be found on the corner of Willowreed and Crystal. Take the item from the Sylveon, then talk to the receptionist to be allowed inside. The player is only allowed if in possession of the Ribbon Collar.
Entering the apartment on the second floor, the player will encounter a Gardevoir, who acts as the caretaker for the apartment's sole resident. Gardevoir will search the player's memory, confirming for herself that Sylveon has been rescued and is in safe hands. As an apology for viewing their memories, Gardevoir shares some of her own memories with the player, and tells the story of the life Sylveon used to live before she was captured by Team Meteor. She also reveals that Sylveon had previously gone by another name: Scarborough. Despite this, her trainer insisted she be called Scarlett. 
After the story, the player may give Scarborough's Collar back to Edie's mother, Lottie. Her and Gardevoir both profess that while it was a kind gesture for the player to return Scarborough's Collar, Edie was anything but a kind trainer to her. They both ask the player to take Scarborough and show her the freedom she was never granted. As thanks, the player will receive the last Department Store Sticker; the Eevee Sticker.