Who was King Bradley supposed to be? In Fullmetal Alchemist (2003 anime series) Fuhrer Bradley/King Bradley is a homunculus and is head of the military in Central. They say the Homunculi are created when an alchemist attempts human transmutation, which always fails and from those failures, a homunculus is created and is born to look like whoever they were suppose to be bought back as.


  e.g. Alphonse and Ed tried to resurrect Trisha, their mother, and end up failing. Years later they run into her but she is known as Miss Douglas.


I can't remember how I know that Homunculi are suppose to look like what they were supposed to be resurrected as but what was King Bradley supposed to be?
I'll take my shot at an answer. In the 2003 continuity, homunculi are created when alchemists attempt human transmutation, as you stated earlier. This more or less explains the origins of:


Wrath, who was created by Izumi
Sloth, who, as you stated, was created by the Elric brothers
Envy, who was Hohenheim's son
Lust, who was created by Scar's brother


Given this "rule" and the examples in the anime, it's at the very least implied that the resulting homunculus from a human transmutation will resemble, at least to a degree, the original intended result of the transmutation.

I don't recall the series explaining the origins of Gluttony, Greed, or Pride, though according to the fan-made Fullmetal Alchemist Wiki, they were all created by Dante. In the case of Gluttony, this seems to have been done for the purpose of creating philosopher's stones, at least according to the FMA Wiki (which may or may not be a reliable source). In the case of Pride, it would make sense to a degree for the homunculus to have been created as a means to control the government for Dante's purposes, but it seems that neither the purpose of creating Pride nor his origins are ever explicitly stated in the 2003 series.