Here’s the voice cast for The Mane 6 from My Little Pony if it was a 1963 cartoon.
Twilight Sparkle:
*Voice Actress: Joan Gardner
*Example: A mixture of The Ghost of Christmas Past from Mr. Magoo’s Christmas Carol and Spunky from The Adventures of Spunky and Tadpole
Rainbow Dash:
*Voice Actress: Billie Mae Richards
*Example: Rudolph from Rudolph the Red-Nosed Reindeer
Applejack:
*Voice Actress: Jean Vander Pyl
*Example: Wilma Flintstone from The Flintstones
Rarity:
*Voice Actress: Janet Waldo
*Example: Judy Jetson from The Jetsons
Pinkie Pie:
*Voice Actress: Norma MacMillan
*Example: Wendy from The New Casper Cartoon Show
Fluttershy:
*Voice Actress: Norma MacMillan
*Example: A mixture of Sweet Polly Purebred from The Underdog Show and Wendy from The New Casper Cartoon Show