Crystal Palace Guardian is the title that Guardian holds and was given to him by the Sailor Scouts. His entry into the Sailor Moon story was purely an accident, it wasn't something he had planned on. Guardian entered the Sailor Moon dimension from ours by means of an experiment that he was conducting for his own personal reasons. He was conducting an experiment for his Tracked Attack Armoured Vehicle (T.A.A.V.). The experiment simply was to test the cloacking device that he designed for his T.A.A.V. The device had opened up a hole in which Guardian and his T.A.A.V. traveled through dimensions until they reached the dimension the Sailor Scouts and their allies called home. When he reached the Sailor Scouts dimension his location where he arrived was where the United States would've been but was missing. This deeply troubled him because for as far as his eye's could see was a vast land of scorched earth. Once he realized where he was and what must've happen, he began a search for any signs of life and any resources he might use to try to return home. The T.A.A.V. had recieved minor damage to it's electrical systems but for the most part still had full use of it's navigational and mechanical systems. Guardian was very pleased to know this and decided to use it to his advantage. The T.A.A.V.,much to Guardian's surprise, found not only a power source but people as well. Guardian decided to go there to the location and find out what happen to about roughly 95% of the earth's population and how those people managed to survive. Guardian felt that maybe he had traveled through time and figured he was looking at what was left of earth after a full nuclear assult. So he was in quite a hurry to find out the truth. Once Guardian reached the location given to him by the T.A.A.V. he couldn't believe his eye's. Standing before him was a beautiful crystal city under attack by what he figured to be UFO's. Unknown to Guardian he was witnessing the Darkmoon fleet destroying Crystal Tokyo. Guardian decided to enter Crystal Tokyo and enter the palace where the signs of life where comming form and then did so. Guardian ran into the Crystal Palace and into Amy (Sailor Mercury) and then fell into the rest of the Sailor Scouts. Although he was very embarassed he tried to introduce himself but was pinned to the ground and interogated. Guardian then told the Sailor Scouts what had happen to him and how he got there. They, at first, didn't believe him but decided to trust him since he hadn't attacked them so they acepted his story. The battle was still raging outside of the palace and Guardian called upon the T.A.A.V. to engage on the attacking fleet and eliminate them all. The T.A.A.V. did so and sustained little damage. The Scouts, King Darian, and Queen Serenity were very greatful and gave Guardian the title of Cyrstal Palace Guardian.