Serial Codes

Serial Codes are special codes that used to input in the game for various rewards.

How to Obtain
There are many ways to get Serial Codes. Most of the serial codes are one-time use, except for Easter Egg codes.
 * Winning contests held by PONOS on their Facebook and Twitter page.
 * Codes that are bundled in the game's merchandise.

Gift Code
One-time use codes that are sent to the winners of PONOS' contests. This code will give the player items such as XP, Cat Food, Tickets.

Developer Code
Special Codes that when used, it will unlock a lot of Cat Units and the game's progress.

Secret Codes
Codes that can be used many times (once per player), this code will unlock a Cat Unit.

Merchandise Codes
One-time use codes included in the game's merchandise. It will give items or Cat Units.

Reference

 * http://battlecats.spica-net.com/unit/serial.html