Castle & Dragon Collaboration Event

Castle & Dragon (城とドラゴン, Shiro to doragon) or ShiroDora for short, is a strategy game published and developed by Asobism Co., Ltd] has a collaboration event with Battle Cats.

Event

 * New Event Chapters.
 * New Cat Units.
 * New Enemy Units.

Impregnable Castle&Dragon
難攻不落の城とドラゴン (Nankōfuraku no shiro to doragon)

Japanese Version

 * January 14th, 2016 - January 28th, 2016.

Reference

 * http://app.famitsu.com/20160114_635606/