Phase 9 is the final phase of the Blue-Green group of levels in the NES version of Balloon Fight.
The level has five Platforms, two Clouds, and two Flippers. Balloon Birds spawn on each platform, with the highest one being pink, the lowest one being yellow, and the rest being green. The platforms are placed like the platforms in Phase 4, with a sort of right-skewed, shallow "V" shape made of four platforms in the lower half on the stage and one last platform in the middle of the screen. One Flipper is placed to the left and slightly above the highest platform, and the other platform is near the top-right corner of the screen. One cloud is directly above the highest platform, and another is in the middle-right of the screen.
- After Phase 12, this stage is repeated, and appears later as Phases 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, A8, B7, C6, D5, E4, F3, G2, H1, J0, J9, K8, L7, M6, N5, O4, P3, and so on.