So you got a Coupon Code.
What can you do with a string of unintelligible numbers?
Turn them in for goodies of course!
In every town in Dragonica, there is an event manager named Gatto (below) working tirelessly to exchange special promo codes for in-game items. *CBT codes may be claimed in both English AND Chinese servers.

Gatto will whip out his list of Current Events for you to look through.
Instructions
To claim your items, click the Prize Item button on the bottom and Gatto will prompt you for your code.
(You may click on the event titles on the left column to read through the various promotions and keep updated on what freebies and goodies to get from where!)

Key it in, and VOILA! Your gift goodies will be in your inventory waiting for you.
Note:
It is not necessary to click the correct event button on the left to claim your items.
*Each code is only usable once PER ACCOUNT. Please pick your character before entering a code to avoid assigning items to the wrong character.