Celebrate! 2003 was a roleplaying forum based on My Little Pony, with the major setting the town of Ponyville. It had a number of sister roleplaying sites, including Dream Valley: Rebirth, Highland Mists, and Xanadia. By early December 2006, it had merged with Course SIM and Dream Valley: Rebirth into C03 Inc.
- Ran from/to: 2003 - present
- Becka Pone - Game Mistress
- Rose Rebellion
- C03Inc MLP RPG. December 8, 2006 post by Delphinbella to My Little Pony Arena. Retrieved December 10, 2006.