Pre Vizsla was a rebel Mandalorian that wants to take over Mandalore and overthrow Satine's Government. He shot one of his men and tried to kill a Jedi in a lightsaber duel and made Tal Merrik betray the Duchess and even send 3 Boarding ships containing Super Battle droids to try to deliver Satine to the Separatist cause. He even send an assassin to try to kill the Duchess but thanks to Obi-Wans effort the Death Watch was forced to begin the attack on Mandalore to try to take over Mandalore. Pre Vizslas attempt to take over Mandalore has succeeded once but he was put to death by Darth Maul. After Many years Darth Grievous sealed his ghost in a Chrysalis which hatched into a Cape wearing bad Guy.
Pre Vizsla was a feared demon general that brought the Sith Legion to take over most of the planets. He was killed when Jazz evade his missiles and shot his chest many times thus killing the Demon General.
In Darth Grievous's evil vision of the future Pre Vizsla lead the Sith Battleships into destroying the Venator Star Destroyers of the Autobots. He was later sealed in a cocoon and later hatched into one of Darth Grievous's reborned armies. A giant sombrero landed on Pre Vizslas head and stayed attached to his evil head which made him very strong but at the cost of being 100% Evil.