Obsidia Department Store

The Obsidia Department Store is a massively tall building in the Obsidia Ward that sells almost every kind of item imaginable. However, due to not-quite-sufficient stock, patrons must have a certain number of stickers on their Membership Card to be able to access certain floors. 
A comprehensive guide to obtaining all eleven stickers for the Membership Card can be found here.
==Floors==
===Floor 1: Low-Tier General Needs, Medicine===
Required: Zero Stickers
===Floor 2: Status and Friendship Berries===
Required: One sticker
===Floor 3: Niche Items 1, Prolonging Items===
Required: Two stickers
===Floor 4: Consumable Items, Special 1===
Required: Three Stickers
===Floor 5: Mid-Tier General Needs, Vitamins===
Required: Four Stickers
===Floor 6: Type Berries===
Required: Five Stickers
===Floor 7: Type Gems===
Required: Six Stickers
===Floor 8: Battle Items, Niche Items 2===
Required: Seven Stickers
===Floor 9: Evolution Stones, Special 2===
Required: Eight Stickers
===Floor 10: Top-Tier General Needs, Rare Berries===
Required: Nine Stickers
===Floor 11: Utility Items, Evolution Items===
Required: Ten Stickers
===Department Penthouse: Exclusive rest and relaxation===
Required: Eleven Stickers.
A maid in the southeastern corner can be repeatedly battled (much to her dismay). She has a team of 6 Blisseys, all of which only know Healing Wish, and awards you 20 Exp. Candy XLs on "defeat".