Wallets are a key item that allows the player to store Cents they receive from adventuring, battling, selling items, etc. The wallet is upgraded upon reaching certain levels.
When the wallet reaches maximum capacity, it can no longer store more Cents. Any Cents that are collected while full will not count progress towards any of the Cent Badges. Instead, if your old wallet is full at 50, and you win a battle that rewards you with 40 cents, the cents you are unable to collect in your wallet will appear around the battle arena, allowing you to get them once you have space again. They vanish in 5 minutes.
Old Wallet - New players start with an Old Wallet. It can store up to 50 Cents.
New Wallet - Automatically upgraded from the Old Wallet at level 8. It can store up to 100 Cents.