upgrade of the second path of the Super Monkey, costing $7650/9000/9720. It increases pierce by 1, allows the monkey to fire two streams of projectiles at once which target indepedently of each other, and provides a slight range boost. In Bloons Monkey City, the Robo Monkey requires a Biomech Enhancements Building to research; the research costs $60000 ($10000 more than the Sun God) and takes 24 hours.
- It is revealed in Bloons Monkey City that the Robo Monkey is powered by the Phase Crystal. However, the Tile isn't needed for the Biomech Enhancements.
- On many maps, three of these with Plasma Blasts are enough to take out a ZOMG.
- This is the icon for Hard difficulty on Bloons Tower Defense 5, except for Extreme tracks.