Serial Codes

Serial Codes were special codes that could be input in the game for various rewards. This feature was removed in mobile versions alongside the Invite Friends to get Moneko feature in the Version 4.3 Update and is defunct in Minna De Nyanko Daisensou as the game ended its live service. Serial Codes as of now are only applicable in the Nintendo Switch version as some rewards require this method to be unlocked.
Note: You must have a linked Nintendo Account in order to claim any bonuses from serial codes in the Nintendo Switch version.
==Classification and Function==
===Gift Codes===
These were one-time use codes that were sent to the winners of PONOS' contests. These codes would give the player items such as XP, Cat Food and Tickets.
===Secret Codes===
These were codes that when used, would unlock hidden Cat Units.
===Merchandise Codes===
These were one-time use codes that were included alongside Battle Cats merchandise (or in the case of Mob Cat and the 5 Kishidan Collaboration Units, movie tickets and CDs). They would give items or Cat Units.
==How to use==
<tabber>
Mobile Version=
	From the title screen, tap the "Invite friends to get Moneko" button at the bottom right of the screen.
	Tap the green button "シリアルコード" at the bottom right of the screen.
	Input the code on these two boxes.
	If you do it right, the rewards will appear after that.
|-|
Nintendo Switch Version=
	Enter the eShop under the Japanese account used to purchase The Battle Cats Unite!
	Scroll all the way down until you see the code redemption screen.
	Input the serial code as shown here.
	If done correctly, the item will be shown properly on the eShop, press the orange button to continue.
	Once the redemption is finished, press the orange button on the left to return to the main menu and launch The Battle Cats Unite!
	NOTE: Make sure you are in the JAPANESE ACCOUNT that you redeemed the serial code in, otherwise the DLC will not appear in the save file.
Press X to confirm on the title screen.
	Press yes to confirm any data updates or serial codes that were redeemed on the Japanese eShop
	Once it finishes validating the serial code, the reward will pop up indicating that the process was done correctly.
</tabber>
==List of Serial Code Cats==
Many of the cats listed below are unobtainable, however, but others have been granted new methods to be obtained, some only in Switch port.
<tabber>
Mobile Version=
Name of Character 	Pre 4.3 Method 	Current Method 	The Battle Cats Unite! Method
Capsule Cat 	Input codes from Nyanko Great War! Strap gashapon machine. 	Reach the milestone during the MattShea Collaboration Event.	Clear any stage by sending only one Cat Unit on the field.
Masked Cat 	Input codes from Battle Cats lottery double chance campaign. 	N/A 	Open the game at midnight.
Maiko Cat 	Input codes from Nyanko Ecology Report. 	N/A 	Clear Egypt 10 times with Cat in the lineup.
Evangelist Cat 	Input codes from PONOS employees' business cards. 	N/A 	Clear The Big Bang.
Toy Machine Cat 	Input codes from Nyanko Great War! Strap 2 gashapon machine. 	N/A 	Play the Cat Capsule 30 times, then clearing any stage in-game.
Blue Shinobi 	Input codes from Nyanko Great War! Strap Set. 	Rolling the Lunar New Year Event Gacha. 	Clear Greece and Russia 10 times.
Clone Elle 	Input codes from Million Arthur Collaboration Event. 	N/A 	N/A
Red Marron 	Input codes from Million Arthur Collaboration Event. 	N/A 	N/A
Cabaret Cat 	Input the serial code: ラス－ボス 	Clear the stage Let's GOOO! <(@0@)> 	N/A
Cat Bros 	Input codes from Nyanko Great War! Strap 3 gashapon machine. 	Clear the stage For the Fans. 	Clear any stage with a lineup consisting of; Macho Cat, Wall Cat and Brave Cat.
Hikakin 	Input the serial code: ヒカ－キン 	Clear Hikakin Advent. 	N/A
Squish Ball Cat 	Input codes from Nyanko Great War! Funyuu Funyuu Mascot!, from 5th Gashapon machine.	Clear the stage Watch & Earn. 	View the Cat Storage for 5 minutes, return to the main menu, and enter the Cat Base.
God 	Input codes from Nyanko Ecology Report Special Edition 	Daily Bonus for 11 and 1/2 Anniversary event. 	N/A
Tutorial Cat 	Input the serial code: とくい－ふくだ 	N/A 	N/A
Ayanokōji Shō 	Input codes from Kishidan's CD "幸せにしかしねーから" 	N/A 	N/A
Saotome Hikaru 	Input codes from Kishidan's CD "幸せにしかしねーから" 	N/A 	N/A
Hitomi Saionji 	Input codes from Kishidan's CD "幸せにしかしねーから" 	N/A 	N/A
Hoshi Grandmarnier 	Input codes from Kishidan's CD "幸せにしかしねーから" 	N/A 	N/A
Shouchikubai Shiratori	Input codes from Kishidan's CD "幸せにしかしねーから" 	N/A 	N/A
Mob Cat 	Input code included in Yakuza Apocalypse movie ticket. 	N/A 	N/A
Yamaoka Minori 	Input the serial code: みのりん 	N/A 	N/A
Nakamura Kanae 	Input the serial code: かにー 	N/A 	N/A
|-|
Nintendo Switch Version=
Name of Character 	Original Method 	Current/Alternative Method 	Versions Available
Cat Bros 	Claim as a gift on the Title Screen and clear Korea during the launch period (December 2018 - February 2019).	Purchase the Package Version Bonus. 	Japanese Version
----
Southeast Asia Version
Mallet Cat 	Purchase the Official Limited Time Edition The Battle Cats Unite Combo Case. 	Purchase the Package Version Bonus. 	Japanese Version
----
Southeast Asia Version
Driller Cat 	Purchase the Package Version Bonus. 	N/A 	Japanese Version
----
Southeast Asia Version
Piledriver Cat 	Purchase the Package Version Bonus. 	N/A 	Japanese Version
----
Southeast Asia Version
Cutter Cat 	Purchase the Package Version Bonus. 	N/A 	Japanese Version
----
Southeast Asia Version
Backhoe Cat 	Purchase the Package Version Bonus. 	N/A 	Japanese Version
----
Southeast Asia Version
Miter Saw Cat 	Purchase the Package Version Bonus. 	N/A 	Japanese Version
----
Southeast Asia Version
Kabuto Cat 	Input serial code from the January 2019 Issue of CoroCoro Comics. 	Login Bonus in the Missions Tab as of Version 1.0.6. 	Japanese Version
Kuwagata Cat 	Input serial code from the February 2019 Issue of CoroCoro Comics. 	Login Bonus in the Missions Tab as of the August 15, 2023 Update Patch.	Japanese Version
Corodragon 	Attend the Next Generation World Fair Winter 2019 Event. 	Input serial code from the October 2023 Issue of CoroCoro Comics. 	Japanese Version
Undies Cat Jr. 	Input serial code from the August 2020 Issue of CoroCoro Comics. 	N/A 	Japanese Version
Manga Cat 	Input serial code from the January 2024 Issue of CoroCoro Comics. 	N/A 	Japanese Version
Manga Boogie Cat 	Input serial code from the April 2024 Issue of CoroCoro Comics. 	N/A 	Japanese Version
Manga Darabotchgogogo Cat	Input serial code from the June 2024 Issue of CoroCoro Comics. 	N/A 	Japanese Version
Taekwondo Cat 	Purchase the Package Version Bonus 	N/A 	Southeast Asia Version
Baozi Cat 	Purchase the Package Version Bonus 	N/A 	Southeast Asia Version
Crazed Baozi Cat 	Purchase the Package Version Bonus 	N/A 	Southeast Asia Version
Li'l Valkyrie 	Purchase the Package Version Bonus 	N/A 	Southeast Asia Version
Li'l Valkyrie Dark 	Purchase the Package Version Bonus 	N/A 	Southeast Asia Version
</tabber>
==Trivia==
*Evangelist Cat is the only non-Special Cat to be obtained via serial code.
*Corodragon and Cat Bros has had the most serial code reruns, having a total three opportunities to obtain said unit.
Category:Game Features