Baa Baa is a standard peon. It may look powerful, but it only has 500 HP and 50 attack power at 100% strength magnification, and drops a fair amount of money to boot. It does not have Area Attack, but its attack rate is quick.
Baa Baas are usually spawned in groups as support for much tougher opponents.
Baa Baa may look menacing, but in reality, it is half as strong as Hippoe. It also has single-targets attack, but its fast attack rate somewhat makes up for it. With proper meatshielding, it can never hit your attackers. Bird Cat/UFO Cat and Titan Cat/Mythical Titan Cat can make quick work of Baa Baas. They can be defeated by almost anything as long as they are not buffed to an extreme extent. Since they drop quite a bit of money when defeated, they are a welcome money source in any stage when they appear.