Cynthia Pokemon is a tall and slender young lady with gray eyes and wavy knee‐length creamy‐blonde hair that covers her left eye with bangs. Cynthia wears black straight‐leg trousers, a long black coat with a V‐neck and black fur rimming its cuffs and hem, and a teardrop‐shaped pearl on the center of the coat.
Cynthia Pokemon Under the coat, she dons a black top. Cynthia’s outfit is finished with black kitten‐heel pumps possessing each a yellow stripe. For accessories, Cynthia wears a black fur ruff around her neck with two pairs of hair clips on each side of her hair, both teardrop shaped and possessing each a yellow stripe. In Platinum, Cynthia encounters the player character several times throughout the story and is interested in aiding the player character in filling the Pokédex. Most notably, she appears in Mt. Coronet in Cyrus’s end of the world and assists the player character through the Distortion World until the battle with Giratina. Her final appearance in the main story is as the Champion.
Cynthia makes her first appearance in Pokémon Diamond, Pearl, and Platinum, where she meets up with the player at various points during their journey. She will first meet the player in Eterna City, where she will give them HM01 (Cut) when first met. In Platinum only, she will give the player a Togepi Egg after the player has defeated Jupiter in the Team Galactic Eterna Building. At Valor Lakefront, she gives the player the SecretPotion to cure the Psyduck blocking Route 210. After the player cures the Psyduck, Cynthia appears again and gives the player the Old Charm to deliver to her grandmother. Later, she appears at the Pokémon League as the Champion.
In Platinum only, Cynthia also appears at the Spear Pillar once Cyrus has been dragged into the Distortion World by Giratina, and will guide the player through the said world in order to confront Giratina. During the post-game, she will appear at the Celestic Town ruins and tell the player about them.
In Pokémon HeartGold and SoulSilver, Cynthia makes an appearance in the Sinjoh Ruins, doing further investigation on the origins of Arceus and the creation trio. If the player has an Arceus with a fateful encounter marker or from the Hall of Origin when they visit the Ruins of Alph, the player will be teleported to the Sinjoh Ruins. Inside a cabin at the ruins, the player will find Cynthia, who will tell the player that Arceus will let them obtain a level 1 Dialga, Palkia, or Giratina. If the player returns to the Sinjoh Ruins with another Arceus (that doesn’t have the same origin as the one they used the first time), they will be informed that Cynthia has returned to Sinnoh, and the event will run without her.
In Generation V, Cynthia appears in a house in Undella Town, where she can be battled. She leaves after being defeated for the first time and afterwards reappears during spring and summer. During spring, she can be rebattled once a day. After defeating her, Shauntal and Caitlin can be seen visiting this house in the spring, and, in Black and White only, Lenora, Elesa, Iris, and Skyla visit in the summer. In Black and White, she speaks about a young Trainer who defeated her, and mentions that Trainer defeated Giratina, referring to the events of Platinum. In Black 2 and White 2, Cynthia can also be battled in the Champions Tournament at the Pokémon World Tournament.
In Pokémon Sun, Moon, Ultra Sun and Ultra Moon, Cynthia appears in Alola’s Battle Tree as an opponent that the player can battle and subsequently recruit.
Cynthia reappears in Pokémon Brilliant Diamond and Shining Pearl, playing the same role she did in Pokémon Diamond and Pearl. She can also be battled against at the Battle Tower in these games.
Cynthia is very interested in mythology and history, and spends her time researching and exploring various sites associated with Legendary Pokémon of the Sinnoh region. Her family lives in Celestic Town, although her own hometown was not mentioned. She is implied to have helped Professor Rowan with his Pokédex and embarked on an adventure as a child, similar to the player.