U.L.T.R.O.N.

U.L.T.R.O.N., also known as the Undying Levitating Terminator of Robotic Oppression and Nihilism, is a Boss Bloon that appears in the Story Mode of BTD7: Planet of the Apes.

All of Me
Taunt: "All of you, against all of me. How can you possibly hope to stop me?"

Ultron will spawn hundreds of U.L.T.R.O.N. Sentries that attack your towers.

Swift and Terrible Sword
Taunt: "You, Monkeys, you are my meteors... my swift and terrible sword, and your World will crack with the weight of your failure. Purge me from your computers, turn my own flesh against me... it means nothing. When the dust settles, the only thing living in this world... will be metal."

ULTRON will drop a whole city from the sky. The large city will smash into the track, making all towers lose 42% of their maximum health and STUNNING them for 6 seconds.