The Null Plane
The "Null Plane" is what happens when you corrupt a plane. There are only 9 Null Planes still in existence. The Null Plane is the rarest and godliest plane of them all with the problem that you cant level up and you get 8 million coins. After many months of trying to find out why/how Null planes are made I decided to look into my devices code mainly the planes id, this led me find see that a Null plane is just a currupted plane with a id of 0.
Upgrades cost: 0 bux