The Paper Bloon is a Bloon made out of many layers of paper, and taking 10 hits to pop. It contains 2 rainbow Bloons when popped. What makes it different than a Ceramic Bloon is it's special ability:
Christmas wrapping: Throws some paper at a monkey, wrapping it in paper. Paper monkeys are immune to this. The wrapped monkey will not shoot for 5 seconds as it unwraps itself, and throws the paper in the air, confusing nearby monkeys, making them 50% less accurate for 5 seconds. The Bloon loses a layer of paper when it uses this ability.
Thanks to Meta07 for the idea of wrapping things with paper!