W.E. A.R.E. N.U.M.B.E.R. O.N.E.

The Wily Evil Atrocious Ridiculous Enormous Notorious Ultimate Mischievous Brutal Eccentric Raging Offensive Nasty Eradicator (W.E. A.R.E. N.U.M.B.E.R. O.N.E.) is a blimp with 340,000 HP. It first spawns on Round 340, and re-appears every 340 rounds. It moves as fast as G.A.L.E.E.M., and spawns 4 P.I.N.G.A.S.s when popped. It also has the immunities of P.I.N.G.A.S.. It resembles a B.A.D. with the number 1 on it, and when it spawns in the map, it endlessly plays the "We Are Number One" song until all your lives are lost or when the blimp is popped.

Attacks
Look at this net that I just found!: Throws a net at one of your towers, successfully catching that tower. Tower that was caught in the net is unable to attack for 10 seconds. Cooldown: 30 seconds

You slip and slide on this banana peel!: Throws a banana peel at one of your towers. Tower that was hit is stunned for 10 seconds. Cooldown: 30 seconds

Master of Disguise: Disguises itself as a ZOMG, but when popped, instead of spawning 4 BFBs, the ZOMG spawns the W.E. A.R.E. N.U.M.B.E.R. O.N.E.! Cooldown: 60 seconds

Gotta chase a superhero on the run: Makes all Super Monkeys on the map disappear for 5 seconds. Cooldown: 50 seconds

Trivia
If you don't get the reference, then shame on you.