Clair (anime)

 Clair is a Gym Leader appearing in Pokémon: Master Quest.

Season 4: Johto League Champions
Clair, among other Johto Gym Leaders, appears in the opening scene of Pokémon: Johto League Champions.

Season 5: Master Quest
Ash and co. encounter Clair when they encounter both her Dratini and Gyarados. The Dratini was under her protection and she didn't want anyone to hurt it while it went through the process of shedding its skin. Clair has also proven to be quite agile when she was swinging from branch to branch to try and catch up with Team Rocket like a pro gymnast. When Dratini was about to be shocked Clair blocked it. This act moved Dratini so much it evolved into Dragonair who helped her beat Team Rocket. Later on it was revealed that she and Liza from Charific Valley have been friends since they were girls. After the ordeal involving Team Rocket and a Dragonite Guardian, The Gym Battle between Ash and Clair resumed, with Clair losing a well-fought battle and gave him the Rising Badge. She helped Ash look for all eight of his badges after he lost them but they managed to find them. She said goodbye to Ash and co. and wished Ash luck in the Johto League.

Season 12: DP Galactic Battles
Clair was briefly mentioned by Lyra during her review of Johto region at the Johto festival.

Season 15: BW Adventures in Unova
Clair returned in Decolore Islands and met Ash's friends, Cilan and Iris. She searched for a shiny Druddigon and after finding it, she captured it. Iris was inspired by her being a Gym Leader specializing in Dragon-type Pokémon.

Trivia
Clair is the second Gym leader to reappear in her HeartGold/SoulSilver attire. The first being Jasmine in Four Roads Diverged in a Pokémon Port!.