Warning Annoying noise =D

I noticed after you beat the game, the moons become a neutral color, and go across worlds. I then decided, I would try to fill up my screen with SO MANY MOONS. Turns out, SO MANY MOONS stops at 150. I went on to collect everything I could find without going to the Odyssey to turn them in, by using Painting Warps. I finally hit the end of everything I could get. Technically, you can just buy a ton of moons and do this, but it felt a lot more worthy finding all these moons legit, and having a stupid 150 icons on my screen for several hours of game time.

(more backstory)
Basically, I fully cleared all the kingdoms before this point, with the exception of maybe 4 moons, then finished the game. After that point, the moons you turn in aren't locked to each level, so I continued to gather all the moons I could possibly get, and turned them in at once. In this 328 moons, I only had about 11 that were purchased as the extra moons you can buy. Maybe a total of 14 were purchased entirely. So most of these were obtained from the bonus moons that become unlocked in post game.