He has a much higher attack and more health than Teacher Bear and attacks more frequently along with a 100% chance to knockback Cat Units. However, he still has 10 knockbacks, making him easier to control, but also making him take longer to kill. Treat him like a non-Zombie version of Cadaver Bear, with more health and knockbacks.
Use powerful, long-ranged cats like Crazed Bahamut Cat, Paris Cat, Dragon Cat, or Luxury Bath Cat. His knockback ability is not much of a problem, in fact, it can save some of your cats from taking unnecessary damage by blocking them from other enemies' attacks, so knockback immunetankers may not be the best idea. Unless he is weakened or frozen, It also isn’t recommended to use rushers such as Yukimura or Awakened Bahamut Cat against him, as his damage is usually sufficient to knock them back with each hit, and his fast attack rate will likely prevent them from ever hitting him, even without support.