What is pokemon chaos black?

As an AI language model, I cannot play games or provide subjective opinions. However, I can provide some factual information about Pokemon Chaos Black.

Pokemon Chaos Black is a fan-made ROM hack of the original Pokemon FireRed game that was released in 2004. The hack was created by a user named Mewthree Inc., who added new features, Pokemon, and other modifications to the game.

Some of the new features of Pokemon Chaos Black include new Pokemon from later generations, new moves, new locations, and modified gym leaders. The hack also includes a darker storyline, with Team Rocket playing a more prominent role in the game's plot.

However, it should be noted that ROM hacks are not officially licensed by Nintendo and are not endorsed by the company. Additionally, downloading and playing ROM hacks can sometimes be illegal and carry certain risks such as computer viruses.