Planets is the 4th Master Extra stage of Super Monkey Ball 2, Super Monkey Ball Deluxe, and Super Monkey Ball Banana Mania, the 294th Ultimate stage without continues in Super Monkey Ball Deluxe, and the 134th Marathon stage of Super Monkey Ball 2 in Super Monkey Ball Banana Mania.
This stage features two goals, a blue goal and a red goal, rather than the standard blue and green goals when there are two goals. It consists of a long platform leading to a drop-off, where the player has to fall onto a partial sphere, with the top cut off. There are then more spheres in a descending order, decreasing in size of flat surfaces. The blue goal is on the second-to-lowest sphere, and the red goal is on the lowest sphere.
The stage is considered very difficult because the spheres on which the goals are have very little rolling space. Go off the drop-off to the first sphere, then to the second, and so forth until you reach the second-to-lowest sphere. Once you have reached the second-to-lowest sphere, hit an area of the flat surface, and retain your balance as steadily as you can in that same position. Once you have settled onto the flat surface, roll into the goal.
To reach the red goal, repeat the same strategy as for the blue goal, but go past the second-to-lowest sphere onto the lowest sphere. Also, be much more careful when landing on the flat surface of this sphere as it is extremely small in size.
Alternatively, you can try to land into the red goal directly from the start although you have to have nearly perfect speed and timing. Turn around and get up on the back end of the starting platform, then charge into and bounce off the left wall of the platform. You should now be going to the right, hitting the lower diagonal platform only once before you're in free fall. While in free fall, hold mostly forward and adjust only a little bit if necessary.
Changes in Banana Mania
The red goal is replaced by a green goal, which will warp to 8 Seesaws.