Cyrus/Manga/PS/History/DP

Cyrus debuts in A Big Stink Over Stunky as a silhouette walking down, where he receives a package. He is fully revealed after signing the receipt and goes to Mt. Coronet. When, , and pass through Mt. Coronet he coldly attacks them with his newly evolved Probopass and Magnezone, trapping them underneath a pile of rubble and leaves while stating that they were disturbing sacred ground.

Cyrus later appears at the Celestic ruins where Diamond and Pearl finally meet him in person. He came to the ruins to find information of the Legendary Pokémon Uxie, Azelf, and Mesprit. He battles Cynthia's Garchomp and later, Diamond and Pearl, who had stolen the camera he used to take pictures of the paintings in the ruins. As they battle each other, Pearl has his Chatler destroy the camera that Cyrus was fighting for. With his camera destroyed and having the information he needed, Cyrus takes his leave and traps the two boys on top of a pillar of stone.

After Mars, Jupiter, and Saturn arrive from their successful mission to capture the Lake guardians, Cyrus begins the creation of the Red Chain.

After managing to make one Red Chain, Cyrus is attacked by the researcher of the Sinnoh myths and the Sinnoh region Champion, Cynthia. After a long battle, Cyrus manages to escape with Cynthia and her Garchomp far too exhausted to follow him. When he goes to check on the progress of the second Red Chain's creation, he finds that Azelf, Mesprit, and Uxie have all been freed from their containers. Cyrus, realizing that recapturing them would be impossible and that he has to use his weaker, artificially created Red Chain, furiously flies off to the Spear Pillar.

He arrives at the Spear Pillar where he greeted by his Galactic Commanders who were worried about his injured state. Cyrus tells them to ignore it and stop any intruders from interrupting his ritual to summon the Legendary and. Cyrus manages to summon the two Dragon Pokémon and has them fight each other, causing time and space to distort in various ways. Mars, Saturn, and Jupiter are eventually defeated by the Sinnoh Gym Leaders and they all ambush Cyrus while he has Dialga and Palkia fight each other. Despite his best efforts, Cyrus is unable to stop them from breaking the Red Chain he was using and unleashes his fury on them.

Later, when Diamond and Pearl go through with their assault on Dialga and Palkia, Cyrus attacks them while under the cover of a thick black. He reveals the reason for why he tried to make a new world; while Emotion, Knowledge, and Willpower make up a complete world, the world they live always has one that is lacking compared to the other two and as such, Cyrus aims to create a world without any of these aspects, a world that is perfect.

When Diamond uses his newly acquired to stop Dialga and Palkia from causing any more space-time anomalies, Cyrus attacks the boy and knocks him off the giant Pokémon. Cyrus states that Diamond wouldn't be able to understand the reason why he does the things he does but the young boy replies with his own definition of Time and Space that he had learned on his journey with Pearl and Platinum. Cyrus at first ignores his words but quickly notices that Dialga and Palkia have stopped fighting with each other and quickly uses the Red Chain to get them fighting again. With only one Red Chain, Cyrus only has half control over the two dragons; Diamond and Pearl decide to take advantage of this and attack the two dragons with their teams.

Dialga and Palkia, now freed from their controlled status, use their powers to create a sphere of light that pulls Cyrus off the ground and into it. As he floats into the sphere of light, Cyrus looks at the Sinnoh Pokédex holders and realizes that they are a perfect combination of Knowledge (Platinum), Emotion (Diamond), and Willpower (Pearl) and that was the reason he was defeated. He is next seen lying unconscious on the ground where Cynthia decides to take him to the hospital before interrogating him. While he and the unconscious Gym Leaders he had defeated earlier are taken to get medical help an accident caused by Charon's machine caused a hole to appear in the sky where mysterious grab Dialga, Palkia, and Cyrus into it.