Items & Inventory Beginner

Backpack and Items

How backpack slots, upgrades, item types, and multi-use items work - and why some copies can't be used or sold.

Updated Jul 12, 2026 21 views

Your Backpack holds every item you buy, win, cook, find, or trade for. It has limited space, so knowing how slots and item types work saves you coins and headaches.

Where to find it

  • Direct link: /backpack/
  • Sort by newest, name, type, rarity, or quantity, and filter by item type.

Backpack space

  • You start with 20 slots, and every item copy takes one slot - 5 apples use 5 slots.
  • Items listed in your shop do not count against your slots while they are listed.
  • A full backpack blocks purchases and reward claims, so keep a few slots free before opening prize wheels or collecting expedition loot.
  • Upgrade from the backpack page: each upgrade adds 10 slots. The first costs 500 MPC and each one after costs 250 MPC more than the last (500, 750, 1,000, ...), up to a maximum of 1,000 slots.

Item types

Items come in these types: food, toys, books, medicine, potions, battle items, tickets, upgrades, vials, accessories, evolution items, nests, and collectibles. Food, toys, medicine, and books are used on a pet; potions and upgrades usually act on your account (coin boosts, extra game plays, resets, unlocks); battle items equip in the Pet Arena; collectibles exist to be collected, displayed, or sold. See Item Effects for what each effect does.

Using items

  • Pet items open a picker so you choose which pet to feed, play with, heal, or read to.
  • Account items (boosts, resets, unlocks) activate directly from the backpack with the Use button.
  • Some items have multiple uses. Each use ticks the counter down; when a copy runs out it disappears and, if you have more copies, the next one starts fresh.
  • A partially used copy cannot be sold, auctioned, or traded - finish it or keep it.

Locked and reserved copies

Copies that are listed in your shop, up for auction, or locked in a pending Haggle Hut trade cannot be consumed. If the Use button refuses or a listing form shows fewer copies than you own, that is why - unlist or cancel the trade first.

Before you sell something

  • The "List in Shop" button shows the item's NPC shop price, its average player-sale price over the last 7 days, and the cheapest current listings, so you never sell blind.
  • Keep food and medicine you will need this week - buying it back always costs more than the sale earned.
  • Check whether an item is a Kitchen ingredient, a quest target, or an arena battle item before letting it go.