In the town of Strathbaile, the heroes have a dream that explains Psaro's plan. Developing a deep hatred of humanity after the death of his elven girlfriend, Rose, at the hands of humans, Psaro plans to become the next Ruler of Evil using the power of evolution he obtained from the "Armlet of Transmutation". The party then complete the set of Zenithian armor to permit entry into the Zenithian Castle. There, they meet the Zenith Dragon, who guides them to Nadiria, where Psaro is undergoing his evolution into the new Ruler of Evil. There, they defeat his generals before challenging him. After fighting a continually evolving form of Psaro, he is vanquished. The PlayStation and DS remakes include a sixth chapter that acts as an alternate ending. This chapter focuses on the heroes working with Psaro to avenge the death of Rose, and finally put the world back in order. Throughout this chapter, Rose is revived and the party is able to defeat her true killer, the Dark Priest Aamon, one of Psaro the Manslayer's subordinates who intended to take the secrets of evolution for himself and usurp him, setting all plans in motion that drove Psaro to his insanity. According to Yuji Horii, he wanted to have something the player went around collecting as the previous "Dragon Quest" games had crests and orbs respectively. However, he did not want to do the same thing over again by forcing the player to collect a certain number of items before they beat the game; mini medals instead have nothing to do with clearing the game. The promotional illustrations for the Japanese version was drawn by famed manga artist Akira Toriyama, whom provided the artwork for the previous games in the series and would continue to do so for every future installment. Unlike all the other games up to this point, the changes in this version were not as radical. Among them were the usual religious/violence censorship, new graphics for the opening copyright and ending credits, and the betting in the Casino was slightly modified to allow more money being won during a bet. "Dragon Quest IV" was remade for the PlayStation on November 22, 2001 in Japan. It was developed by Heartbeat and published by Enix. The remake was developed using "Dragon Quest VII's" 3D graphics engine. The characters, towns, world maps, sound, battles and enemies all received updates. The character sprites were updated to match the original artwork for the characters in the original "Dragon Quest IV" Manual and artwork.