The WAN file format is used in Pokémon Mystery Dungeon: Explorers of Time/Darkness/Sky to store animated character sprites along with map props, and even some UI elements.
This format is always wrapped by a SIR0 container, and it doesn't possess its own magic number. However, it does have its own header and structure. Its one of the most complex formats used in the game.
It can have a different file extension, depending on the type of sprite it contains. So far, WAN and WAT are both su