Prince ( FMR ) The prince is the player character in " Yu - Gi - Oh ! Forbidden Memories " . His name is chosen by the player . He is referred to as The Hero in the instruction manual . While , he resided in Yugi Muto ' s body , he was referred to as Yami , by Shadi . This is a video game depiction of Pharaoh Atem , a character from the " Yu - Gi - Oh ! " manga and anime . He is a silent protagonist , with the exception of one scene in the game . Biography . Atem often snuck out of the palace to spend time at the Dueling Grounds , with the villagers , particularly Teana and Jono , who were unaware of his royalty . After returning to the palace one night , he found the mage , Heishin , now in possession of the Millennium Rod , had attacked the palace and demanded the Millennium Puzzle . The prince ' s attendant , Simon Muran , gave the prince the Puzzle and told him to run . He could not escape and was confronted by Heishin , who demanded the Puzzle . The prince Dueled him in an attempt to escape . After losing , Simon convinced the prince to shatter the Puzzle . After shattering the puzzle , Simon sealed the prince and his spirit inside it . He remained there , asleep for millennia , until Yugi Muto entered a " Duel Monsters " competition , hosted by Seto Kaiba . Shadi , holder of the Millennium Key and Millennium Scale appeared and said that he came because of Yugi ' s Millennium Item . He used the Key to open Yugi ' s mind , where he could meet the prince . The prince gave Yugi six cards and although he did not speak , Yugi understood what he wanted of him . Yugi defeated all the present day holders of the Millennium Items in the tournament , each time sealing their Item in one of the cards . Using the six cards , Yugi was able to send the prince home . When the prince arrived home , the mages had taken over the area . He headed to the Valley of the Kings , in search of the Forbidden Ruins . Here he met Sadin , who recognized him as Prince , but did not know the location of the Forbidden Ruins . So the prince returned to the palace , which was in ruins . After confronting and defeating a Mage Soldier there , the prince found a map to the Forbidden Ruins . The prince returned to the Valley of the Kings , where Sadin escorted him to the ruins . There he found a map and met Seto , who informed him the map showed the location of where Heishin had hidden the Items , and told him of his plans to betray Heishin . After defeating two of the high mages , the prince met Jono , who told him that the mages had kidnapped Teana and led him to the Dark Shrine . After passing through the labyrinth , facing Labyrinth Mage s , at wrong turns , they found Teana held hostage by Seto and Heishin . Heishin ordered Seto to defeat the prince and take the Millennium Puzzle . The prince defeated Seto , but was confused when Seto applauded him and said that the High Mages did not stand a chance . Teana was released and she , the prince and Jono left . The prince proceeded to defeat the High Mages and acquire all Millennium Items bar the Rod , which was held by Seto . After doing so he met Seto , who told him to go to the Dark Shrine , where he would lead him to Heishin . There , the prince defeated the Guardians Sebek and Neku , before finding and defeating Heishin . After Heishin ' s defeat , Seto took the prince to the Forbidden Ruins , where he explained that he used him to gather all the Items . He told him how the Millennium Items could be used to summon a great power . As Seto is about to claim that power , Heishin appeared and put a knife to Seto ' s neck , demanding the Items . Atem handed them over the items , which Heishin used to Summon DarkNite . DarkNite refused to obey Heishin and turns him into a card , which he incinerated . Using the Millennium Item cards , the prince held back DarkNite and faced him it a Duel , to send him back where he came from . When the prince won , DarkNite turned into Nitemare and demanded a final Duel . The prince played on and defeated Nitemare . Afterwards , Atem ruled on as king . Duels . The prince takes part in the following Duels . Depending on the actions of the player , some Duels do not have to be played and all Duels can be won or lost . The results necessary for the progression in the game are mentioned below .