After the show Pinkie is still the lovely pink and happy mare we met. Throwing amazing parties and making sure no pony is sad. At one of her parties she fell in love with a stallion that's name is Pokey Pierce. Shortly after they got married and this marriage would last forever (Let's just say that they was a huge party cannon with a just married sign on it and sorry to you Pinkie x Rainbow shippers.). She also had three foals with Pokey, Cotton Candy which they call Candy, Cloudy Skies which they call Sky and Sugar Rush which they call Sugar. Even after her fillies birth she still remained happy and cheery. Like Pinkie she kept in contact with all her friends especially Rainbow Dash. She is currently enjoying life with her goofy family.
After the show Rarity became a massive star in the fashion world. If your not wherein her then your under a rock .When Spike was old enough they got married and moved to Canterlot for Rarity's job. They had two foals but no ordinary foals, they were dragon pony hybrids. Their names were Crystal Clarity which is called Claire and Turquoise Blitz which was called T. When T was 5 they all moved back to Ponyville. She is not only a mother she is the aunt of Pixel Bit, Button Mash and Sweetie Belle's foal. Rarity is currently enjoying her life with Spike and managing her fashion reputation.
After MLP: Twilight Sparkle
After the show Twilight has had an eventful life. She fell in love with a guard like her sister in law, (if you haven't guessed it yet then brace yourself.) his name was Flash Sentry. (Sorry to you Twilight x Celestia, Twilight x Luna, Twilight x Rainbow and many, many other shippers.) They are currently living in Canterlot but they will move back and forth to Ponyville in back thanks to royal duties. Twilight still kept in touch with the rest of the mane 6 even though being occupied by royal duties. She later had two foals with Flash which are named Starburst nicknamed Star and Night Light nicknamed Nighty. She is also the aunt of Valiant Heart which is the foal of Shining Armor and Cadence. In recent years Flash hasn't been coming to Ponyville (No he's not dead) because of recent love develop meant. She is currently enjoying her life as a full grown mare, princess, aunt and mother of two healthy foals.
After the show Fluttershy never married. (Sorry to all you Fluttershy x Big Mac, Fluttershy x Discord and any other) She adopted a filly named Anthea but always called her Annie. She opened a clinic for animals and earned a degree in veterinary care. Even though having to talk to many ponies about their pets she is still the shy and quiet mare you were introduced to on the show. She kept in touch with every pony after adopting the 4 year old. With her caring nature she raised this filly well. Her filly retained the the shyness that her mother had but not quiet as quiet. Currently she is happy and successfully in her clinic and is know thoughtout Equestria as the 'animal whisperer.' She is currently enjoying her life as a veterinarian and a over-protective mother of the filly she adopted.