The Brass Bloon is a Bloon in the Metal Bloons family, so it is immune to anything sharp. It is made out of brass, hence its name. It takes 40 hits to pop and has a 75% chance to release 2 Silver Bloons and a 25% chance to release 3 Silver Bloons upon popping. Also, plasma and sunrays do 2x damage to Brass Bloons.