Bright Smile

Castle is the placeholder name of a Crystal Earth pony stallion with a bright teal coat, golden mane and tail, gold eyes, and a cutie mark of a crenelated tower. He has a speaking role in the episodes The Crystal Empire - Part 2 and Equestria Games.

Design
Castle shares his design with "Ivory", "Rubinstein", "Ardent", "Zirconic", "Check Mate", "Crystal Varado", and S03E02 Unnamed Earth Stallion #1.

Depiction in the series
Castle is one of the nine most frequently appearing Crystal Ponies, along with "Amber Waves", "Autumn Gem", "Crystal Arrow", "Fleur de Verre", "Ivory", "Night Knight", "Paradise", and "Rubinstein".

He first appears in The Crystal Empire - Part 1 during Princess Celestia's flashback of the Crystal Empire, shown to be considerably close with "Fleur de Verre". Later in the episode, he is one of many Crystal Ponies having become depressed as a result of King Sombra's curse. Hearing news of the Crystal Faire lifts his spirits and returns color to his coat and mane.

In The Crystal Empire - Part 2, Castle has other forms of fun at the Crystal Faire, like watching Rainbow Dash and Fluttershy's jousting match. At the end of the episode, he has a brief speaking role when Princess Cadance swoops down from the sky with the Crystal Heart, calling her the "Crystal Princess", and he helps power the Heart to defeat Sombra.

Castle takes part in the cleaning of the Empire and trains with Shining Armor and other Crystal Ponies on the stadium track in Games Ponies Play, and he appears during Morning in Ponyville in Magical Mystery Cure.

In Flight to the Finish, Castle appears in the stadium crowd at the Crystal Empire during the Cutie Mark Crusaders' flag-carrying audition. He also appears at the Rainbow Falls Traders Exchange in Trade Ya!, has a speaking role in which he asks Spike for his autograph in Equestria Games, and is seen in the crowd welcoming the dignitaries in Twilight's Kingdom - Part 1.

Appearances
Times are approximate.

Storybooks
Castle appears on pages 15 and 18 in the storybook Welcome to the Crystal Empire!

Quotes
"Behold! The Crystal Princess!"

- The Crystal Empire - Part 2

"Look, look, it's the Great and Honorable Spike the Brave and Glorious!"

- Equestria Games

"How you saved our Empire last time last time you were here was really amazing!"

- Equestria Games