DO NOT USE YET. First we discuss whether this is better to replace the tables on this page and this page.
Green cells are starter characters. Red cells are unlockable characters. Blue cells are characters that are a transformation of another character (and so share starter/unlockable status). Yellow cells are of unknown status. Orange cells are downloadable content. For SSB4, the left side is the 3DS version, and the right side is the Wii U version.