Other NPCs.
Cheese Sandwich - (Weird Al's cameo in the show) a travelling party organizer, who was inspired by Pinkie's example as a kid. Might need some help organizing a big party, or might compete with Pinkie. Might give the players Boneless, his rubber chicken.
Troublehooves - a full grown draft horse, and a known criminal sabotaging rodeos. In reality, he doesn't realise he is wanted, and just sneaks in to watch, invariably causing accidents - which makes him so ashamed, he keeps hiding, keeping the problem going. He blames it on his "bad luck" cutie mark, which he got while auditioning for a rodeo in his youth. In reality, his cutie mark is actually for rodeo clowning - he keeps having accidents because he's big and clumsy, and his special talent only makes them look hilarious.
Filthy Rich - the wealthies pony in town, largely through buying and re-selling the products of Apple's farm (the business started by his father, Stinking Rich) He's a fairly reasonable and polite despite his wealth. Sadly, his wife and daughter aren't (see notes in posts above)
Dr Hooves - an earth pony inventor, enthusiastic about testing the limits of science. Has a house full of wacky inventions, and might provide some clue tokens, or perhaps gadgets.
Octavia - a posh cello player. She played in the palace, so she might know some important people. Shares a house with her friend Vinyl Scratch.
Vinyl Scratch - a popular DJ. If something can be solved by organizing a rave, she's your girl. Also tech savvy. The problem is she is mute, and never takes her headphones off, so communicating with her might be a challenge.
Photo Finish - a photographer famous in the fashion industry, an ADHD genius who tends to rush in with her assistants, and bully ponies into posing for whatever project she's working on. She's usually gone as fast as she arrives, and her photos are really good. She once pressured Fluttershy into professional modelling.
Cranky Doodle - the resident donkey, old and irritable. He's more bearable since Pinkie reconnected him with Mathilda, his lost love, but he's still the least cheerful of the town's residents. He's bald, and keeps losing his blonde wig in freak accidents.
Treehugger - an earth pony with a demanour and personality of a stoned hippie. She's Fluttershy's friend, and almost as good at peacefully interacting with nature as she is. Might appear anywhere where interesting plants or animals appear. Keeps talking about auras.
Maud Pie - Pinkie Pie's big sister. She's seems impassive, but in reality, she's as weird as Pinkie - she just has all the expressiveness of Wednsday Addams. She might appear anywhere where rocks are involved. (she's working on her rocktorate in geology)
Might need help looking for something - like her pet rock, Boulder. Unlikely to need physical help - between the natural earth pony strength, and her rock cutie mark, she's a living bulldozer, and won't hesitate to use it if her sister is in danger.
Lyra and Bon Bon - an inseparable pair of friends, made popular by a scene of Lyra sitting like a human in the background. While she seems to be the weird one of the two, it's actually Bon Bon who has a secret - she's actually special agent Sweetie Drops, hiding under cover in Ponyville, after her secret monster hunting group was dissolved. (might provide clue tokens, or various spy gear)
