O.N.E.

The O.N.E., or O verly N ormal E verybloon, is a bloon. It isn't MOAB-class, although it does have a decent RBE. It takes one hit to defeat and contains one Zebra Bloon, giving it an RBE of 24. Despite this, it only takes away one life if it gets past your defenses. It has one single ability, and it is passive:

Single Bloon: Repels non-O.N.E. bloons in a 30 pixel radius. Always sends bloons backwards.

It moves at a speed of 1 relative to the Red Bloon.