Goren is originally NOT the king. Everyone thought he was because he imprisoned so many mamodo in tablets. Apparently, you do not become king by being the last mamodo standing. (Weird, I know).
Also, everyone remember good ol' dragon Baou? He's evil. XD You see, the Baou spell was originally going to be given to Zeon. Their father gave it to Gash because he believed he could control it better. Baou feeds on hate and anger. It can devour your soul. When the true form of Baou was released in episodeIforgotwhen, everyone found that out. Baou was originally Gash/Zeon's father's. It was like a pet of somesort. The father created Baou to stop all the hate and anger in the world.
Time for some Dufort spoilers. His past is revealed!!
Okay, Dufort was treated as a lab rat all his life. His mother sold him into research at a young age. He was taken care of by this evil scientist all his life. He'd make him solve VERY complicated puzzles in which he would have to use his AnswerTalker ability.
(Answer Talker is the ability to predict the opponents next move before it happens. Kiyo has it too. XDD Think of it has Pride's eye from FMA)
Anyways, once Dufort found out what he was being used for, he went insane. He tried to excape, and managed too. (Well, not really). The ebil docter transported him to the North Pole, telling him he was done with Dufort and was now useless. He told him his mother sold him into research at a young age. Then the transmission thing exploded, and Dufort was letf out in the cold. ;;