Munny is an item from the Kingdom Hearts games.
Munny (not "money") is the currency (possibly universal currency) in the universe Sora lives in. It has value in Traverse Town, Agrabah, the Radiant Garden, and Twilight Town. The origin world of munny is never revealed, but is possibly Traverse Town (as that is the only world in which it is directly referred to).
Munny may be obtained by many means. The most primary way of obtaining munny is by defeating the Heartless or Nobodies. In this way, munny may be acquired through Munny orbs, orbs that are half-gold, half-blue. They may come in three sizes: the smallest is worth 1 munny; the middle-sized is worth 5 munny; and the largest is worth 20 munny. Another way to acquire munny is by using Trinity Marks. Trinity Marks tend to reveal orbs; most commonly tons of Munny orbs. A third way is by selling goods and synthesis items. The only way to lose munny is by purchasing something.