Batman is known to use a diverse range of martial arts styles during combat, including Muay Thai, Western boxing, Judo, and submission wrestling. According to some sources, Batman knows every fighting style in the world, but he primarily utilizes a set of 10 to 15 core martial arts and fighting styles during combat. These include Aikido, Krav Maga, Taekwondo, Karate, Kung Fu, and Jiu-Jitsu, among others. Batman is also known to have his own personal combat form called Keysi, which is a synthesis of different martial arts forms brought together. While the exact number and types of martial arts that Batman knows may vary depending on the source, it is clear that he is a highly skilled martial artist who has mastered a wide range of techniques and styles to become one of the most dangerous humans in the DC universe.