Minus Vivi, because there are several 16-bit black mage sprites already, and Quina, because Quina sucks.

Who was made from whom:
Amarant was made from Final Fantasy VI's Sabin
Eiko was made from Final Fantasy IV's Rydia, appropriately enough
Freya was made from Final Fantasy V's Faris as a Bard, which went better than I expected
Garnet was made from Final Fantasy V's Lenna as a Freelancer
Steiner was made from Final Fantasy V's Galuf as a Beastmaster with a recolored Red Mage Hat, I'm not really happy with this one
And Zidane was made from Final Fantasy VI's Locke. Notice how he got like a million times more butch

If anyone wants something like this of their character(s) or fursona(s), let me know, they make nice icons.
Final Fantasy and so on belongs to Square Enix.