Avenger

Normal
The Avenger is a special agent that costs 80 Monkey Money. It attacks in an area in front of him, popping 1 layer of every bloon there. It attacks about as fast as an unupgraded bomb tower. Everytime a tower dies or gets destroyed while the Avenger is placed, it's arc of attack grows wider and it pops 1 extra layer at a time. This can go up to a full circle around the Avenger and dealing 10 layers of damage per swing. It looks like a skeleton with a giant scythe. The scythe grows bigger everytime a tower dies while it is placed. The avenger cannot pop camo or lead. The Avenger has infinite health, but nothing will target it.

Pro
After 50 uses, you unlock the Avenger Pro. The Avenger Pro will revive a dead tower for every 1000 it pops and gives you 5 lives for every 100 bloons it pops.