Perforated Bloon

The Perforated Bloon is a boss in the next Bloons Tower Defense game, and shows up between rounds 100 and 101. It is basically a giant Overpowered red bloon with a hole in it (it is actually the first red bloon you popped in the game, which has somehow survived and come back for revenge). All towers are able to damage it, but any attacks that go into the hole will not do any damage. It does not actually attack, but it takes 100 hits to beat, and cannot be hit in the same place more than 5 times (at which point a new hole forms, and any attacks going into this will not do damage).