E.V.O.L.V.E.

The E.V.O.L.V.E., or Epic v1.1 Ornery Level-upper of Evil, is a blimp that evolves Bloons. It travels at 1.5x the speed of the fastest Bloon on-screen, other than Evolution Bloons and other E.V.O.L.V.E.s. (If there are no other Bloons on-screen, it defaults to 0.3x the speed of a Red Bloon.) It has 5,000 HP, as well as gaining 3 HP a second (This can go past 5,000 HP!), and first appears on Round 90, alone. Any Bloon it touches evolves 2 ranks up, though if Bloons are 1 evolution away from the end of their line, they only evolve once, and if they can't evolve, they won't evolve. It holds 3 Evolution Bloons. (These are spaced, so don't worry about them evolving each other) It has no parents. It also has a 10% chance to evolve from Evolution Bloons. It also has abilities:

Ray of Evolving: Fires 5 rays at the strongest, possible to evolve Bloons. If there are 4 or fewer Bloons it can effect on-screen, the leftover rays target random towers, giving them a random FREE upgrade! (But this upgrade must cost $5000 or less) If there aren't enough Bloons or towers, the remaining rays don't fire!) This attack is used every 20-40 seconds.

Evolved Rush (Passive): Sends in a rush of random Bloons with RBE from 5 to 100, though no M.O.A.B. class Bloons or Bloons with properties will appear. 6 seconds later, an Evolution Bloon comes in and evolves them all! This also speeds up E.V.O.L.V.E., beware! This attack is used every 30-60 seconds.

Regeneration Flash: Flashes and makes all Bloons Regrowth. Other properties stay, too! This attack is used every 15-40 seconds.

Possesion: Makes a random tower's projectiles evolve Bloons for 10 seconds. If this tower hits another tower, that other tower gets a random fewe upgrade that costs $1000 or less. This attack is used every 40-100 seconds.

Spirit of Evolving: When it dies, the E.V.O.L.V.E. leaves behind a spirit. This spirit enters a tower, making all its projectiles evolve Bloons by THREE ranks, as well as making them turn them Super Regen! AND they do NOTHING to other towers! And this lasts...15 seconds! Oh, and it turns M.O.A.B.s into I.A.B.O.B.E.s! (This ability is exactly why it first appears on Round 90!)

Bloonopedia
"When a bunch of Evolution Bloons got in a fight because they all wanted a lollipop on the ground, they accidentally evolved each other! 10 stayed as Evolution Bloons, 3 became M.O.A.B.s, 1 became a Super Bloon, and 1 became an E.V.O.L.V.E.!