Shadow Julian is a truly evil counterpart to Julian, created by the corruptive influence of the Sorcerer's Chaos Pearl, bringing every part of Julian's darker side to life and giving it dangerous powers.
In "Julian's Birthday Surprise" during his birthday, he had it at a great stage magicians show. However he was miserable at his own failures at learning to illusions, and after Howard told him he couldn't get worse, Randy went to comfort him, Julian began a long life story. However Randy slipped into the Nomicon while he was talking. During this Julian found and took Randy's bag containing one of the Sorcerer's Chaos pearls believing it to be his birthday present. The orb's evil power began to corrupt him, Randy managed to get it back but not before Jullian had gotten a taste of its power. During the show, Jullian managed to get the stage magician to involve Randy in a trick allowing him to steal the Pearl. The Pearl then empowered him giving him genuine magical powers, but also corrupted him and drove him insane as the power has bonded with the darker side of his personality.
He attacked the show, driving the stage magician away, before bringing the gargoyles to live and turning the robot on the guest. Using his new power he opened up a doorway to the Shadow Realm, planning to throw his guests in. However Randy fought back and managed to save them. As the creatures from the realm of shadows tried to pull him in, Randy managed to swip the Pearl from Julian. Howard managed to retreave it and offered it to Julian in exchange for freeing Randy. Julian agreed but Howard threw the bag, and grabbing it Randy threw it into he portal. Julian tried to jump into get it back, but Randy managed to pull him out, as well as forcibly seperating the corrupted part of him created by pearl in process. The real Julian awoke unsure what had occured, while his evil counterparter (which is none other than embodiment of his darker side that has bonded with powers of Chaos Pearl) was trapped in the land of Shadows. It was there he learned Howard had tricked him and the bag only had one the gargolyes heads in it.