Battle Cats Ultimate

A fan-made program featuring data and animations in The Battle Cats by PONOS, along with custom content.

Installing BCU Version 5 for Windows, macOS, or Linux

Download and install the JRE that corresponds to your operating system.
- For macOS users, you might want to download JDK 8 as well in the case that BCU fails to work properly, especially if JOGL is enabled.
Download BCU-Initializer.jar
Move the jar to a new, empty folder, then run the jar.

Frequently Asked Questions

How do I create custom content? / How do I animate?

Refer to the links below with the label "BCU Tutorial" under the Links & Resources section.

Common Issues/Errors

If none of these apply to your situation, you can report it through GitHub Issues or the BCU Discord server, linked below. Make sure to include the most recent error log, which should be the newest .log file in the log folder.

All Platforms

Another BCU is running or last BCU didn't close properly
- If the last BCU crashed, this will be the default message.
- It's advised to avoid running two BCU instances at the same time, as well as allowing BCU to close properly.
- If there was a real problem that seemed to have caused the crash, follow the above instructions to report the problem.
Not enough memory
- Open up BCU again. In the main menu, If the number on the top left says # / 247 MB and your computer is 64-bit, you installed the wrong Java. Install 64-bit Java instead.
- If the above fails, you may need to use run.bat, which is available in the BCU Discord server, linked below.

Windows Issues and Warnings

Don't install Windiws Online installer if your OS type is 64-bit. You will have to download Windows Offline (64-bit) one. It's fine to install Windows Online or Windows Offline if your OS type is 32-bit. If you install incorrect JRE, BCU will have memory space issue.

Do not run BCU with Open with Java option! This will connect BCU with system32 folder, and BCU will try to create subfolders in there.