BTD4 Spy Plane

The Spy Plane in BTD4.

Spy Plane is an upgrade of the Monkey Ace tower in Bloons Tower Defense 4 and Bloons TD 5. It costs $300 on Easy, $350 on Medium, $380 on Hard in BTD4. In BTD5, it costs $TBA on Easy, $400 on Medium, $TBA on Hard, and $TBA on Impoppable.

Bloons TD 4Edit

It allows nearby towers to detect Camo Bloons. It costs $300 on Easy, $350 on Medium, and $380 on Hard. Note that Monkey Aces will always be able to pop Camo Bloons, even accidentally.

Bloons TD 5Edit

  • The upgrade button in BTD4.
  • Monkey Ace in BTD5 with Spy Plane upgrade
  • Spy Plane's upgrade pic
  • Spy Plane Official Art Work
  • The Spy Plane in BTD5
  • Spy Plane upgrade description
  • BMC icon
This allows the Monkey Ace to hit Camo Bloons. Even though it does not aim for a target, it still needs this to pop Camo Bloons. Otherwise darts and explosives from this will not pop the Camo Bloons. Spectre and Neva-Miss Targeting will target Camo Bloons but will not pop them without Spy Plane.


  • In BTD5, this upgrade does not allow camo detection for all towers.
  • The Spy Plane in BTD4 looks similar the real-life SB2C Helldiver.
  • In BTD5, without this upgrade, darts shot from the Monkey Ace will still be fired, but won't pop the Camo Bloons they make contact with, and will simply pass harmlessly over them.