King Croacus was the title bestowed onto the ruler of the Floro Kingdom, the exception being the one female ruler, named Queen Croacus. King Croacus I is sometimes referred to as simply King Croacus due to him being the first ruler. King Croacus IV is the only leader actually seen in-game, but there is a palace in the Floro Caverns with pictures on all four leaders. There are signs underneath each picture that says the time that they he/she ruled, what accomplishes he/she made to the Floro Kingdom and how he/she died.
Also known as the Iron Rose, King Croacus I was the first king of the Floro Sapiens. King Craocus I was the one who united all of the Floro Sapiens and created a kingdom for them to live in. The Floro Sapiens live in different places, but mainly live where the palace was constructed, in the Floro Caverns. King Croacus I was a strong leader and was loved by all of his servants.
However, the Iron Rose was not a good leader for all of his life. He created the Floro Calender after creating the Floro Kingdom, starting at Floro Year 0. In Floro Year 444, the Iron Rose's son wilted and died (it is unknown who the wife is and how many children they had). The Iron Rose then became corrupt and evil due to his son's death. He was over-thrown and power was given to his daughter, later named Queen Croacus II.