Transformers & Sailor Moon: Prime- Powerful Alliance Of Heroes, Legendary Defenders & Saviors Of The Silver Millenium, The Coming Of The Golden Millenium is a fan fictional crossover story. File:Placeholder The main crossovers are Sailor Moon, Transformers, Yu-Gi-Oh!, InuYasha & Kingdom Hearts and also Mobile Suit Gundam Wing.. This is a reteling of Sailor Moon & Transformers: Prime in the time of the Silver Millenium. The Silver Millenium took place in the 21st century.