Bloon 42

Bloon 42
Bloon 42 moves at the speed of a Pink Bloon, takes 3 hits to pop, and releases 42 red bloons when popped, making the RBE 45. It is immune to sharp things and explosions. First appears on level 42.

History
Bloon 42 used to be just a normal Pink Bloon, but then it found a mysterious object, some sort of Guide to the Galaxy. While reading that, it transformed into Bloon 42 and has been constantly searching for the answer to Life, the Blooniverse, and Everything.