FF6 Steam Version

From the form I found the utilities on, it appears the original image format is palette-indexed PNG, which means 256 colors will be the max.

But you want to know the really odd thing? People like to throw around "God, this looks like it was designed in an RPG Maker", but this restriction, with this particular color background, and this sprite layout is almost a dead ringer for the sprite requirements of RPG Maker 2000 and RPG Maker 2003. SE, this is probably not a good thing.