Belle- Sweetie Belle
The Beast- Spike (Dragon form for the Beast, a Pony form for his regular self, and it will be an Alicorn)
Gaston- Button Mash
Lumière- Fancy Pants
Cogsworth- Pipsqueak
Mrs. Potts- Fluttershy
Chip- Pound Cake
Maurice- Magnum
Lefou- Snips or Snails
Stove- Flash Sentry
The Wardrobe- Rarity
Babette- Fleur.
Bookseller- Luna
Enchantress- Celestia
Monsieur D'Arque- Sombra
The Baker- Mr. Cake (bet you didn't see that coming)
Footstool- Winona
three annoying girls- Diamond Tiara and two others. (I'm giving Silver Spoon a Break)
Narrator- Shining Armor