The popularity of themed inflatable castles can vary depending on current trends, popular characters, and individual preferences. However, here are some themed inflatable castles that have been popular among children:

1 Princess Castle: Castles with princess themes are perennial favorites, featuring elements like tiaras, fairy tale motifs, and vibrant colors.

2 Pirate Ship: Inflatable pirate ship castles create an adventurous atmosphere with features such as pirate flags, cannons, and treasure chests.

3 Superhero Headquarters: Superhero-themed castles featuring popular characters like Spider-Man, Batman, or Superman can ignite children's imaginations and make them feel like heroes themselves.

4 Jungle Safari: Jungle-themed castles with inflatable palm trees, animals, and vibrant foliage provide an exciting and adventurous setting for children.

5 Under the Sea: Castles with underwater themes, incorporating colorful fish, seashells, and aquatic creatures, can create a magical underwater experience for children.

6 Outer Space: Inflatable castles with space themes, featuring rockets, planets, and stars, appeal to children's fascination with the vastness of the universe.