Crazy Headcanons

Alula is afraid of clowns.

Sunshine Goop ponies reproduce by budding, emerging from goop structures, or by hatching from eggs, among other ways.

Ponies don’t usually get bigger gradually, but go through growth spurts. Go to sleep filly-sized, wake up mare-sized, that sort of thing. (Inspired by a mixture of “Amending Fences” and Cheese’s flashback in “Pinkie Pride”.)

When two ponies get married, it is tradition to have the partners cutie mark on the wedding ring.

@ice1517  
Where does the wedding ring go?

@Kirb  
For Unicorns, the horn.  
For Pegasus, the tip of either one or both wings.  
For Earth Ponies, they were it has a necklace.
 
Some of these are not mutually exclusive though. Pegasus and unicorns can opt to have the ring as a necklace, and alicorns can opt for any of the 3.

Sunset will live out the rest of her life and die in human world, but her body will be buried in the Canterlot of her own world, so as not to attract attention to her demise.

Under the effects of depression from banishing Luna, Celestia once banned all cheese related products for years as a way to spite Equestria.
 
Those days became known as the Dark Ages.

@HJSDGCE
 
The hobgoblins were really cheesed off about that one.

Celestia and Luna love playing Warhammer 40k. With the Blood Angels and Night Lords being their respective favorite armies.

While the possibility of the stallion taking the mare’s name upon marriage was brought up in this thread (at least I think it came up in this thread), I don’t believe any names were mentioned. So… Before marriage, Mr. Cake’s name was Carrot Bread. (Mrs. Cake didn’t want to spend the rest of her life as “Cup Bread”, and I don’t blame her.)

When Sweetie Belle heard her actual voice for the first time, she burst into tears because she sounds like Mare Corlett.

Celestia has an intense hatred with Griffonstone.  
It was because they banned her from eating any more of their scones. She once tried to wipe them of the face of the planet, but that was quickly stopped by Sunset Shimmer before her fall. Back then, Sunset was also Celestia’s advisor.
 
Sunset was later claimed a hero by griffons everywhere. Though, they sold off her golden statue later and was melted to become earrings.

@Wiimeiser
 
Haven’t you posted this one before?

The reason Big Mac is as strong and tall as he is was because he was born with giantism, which made naturally more taller and stringer then most ponies. However, he had been suffering form back pains, and decided to get surgery to remove the tumour affecting his growth, and now cant grow any taller.
 
Troubleshoes also has giantism, but he had to get it removed later on in his life, compared to big mac, who had it removed earlier in his life, which resulted in him being very tall.

It is considered impolite to touch another ponies muzzle.

@Crystal Neighybánya  
But what about boops then? There must be boops!

@JP  
As long as both parties consent, boops are ok.

@ice1517  
That’s better.

The only pony Celestia fears in Equestria is the royal baker. The reason was that, after Celestia played a prank on the baker, he decided to make the Princess a variety of cakes, but they were full of laxatives.
 
Rumour has it that Celestia spent 4 whole months staying on the toilet, and the castles plumbing system wasn’t working properly for 7 months.

Diamond Tiara swears like a sailor when she’s angry.

@Crystal Neighybánya  
As does Silver Spoon, Trixie, Fancy Pants, the Cakes, Carrot Top, and most surprisingly, Derpy.

@ice1517  
Silver Spoon - on the other hand - never swears and uses phrases like “Fiddlesticks” and “Darn Tootin” whenever she’s angry. Sometimes Diamond Tiara will deliberately antagonize Silver Spoon because she finds Silver Spoon’s inability to swear hilarious.

@Crystal Neighybánya  
Wait damn it, I thought you said Silver Spoon. Shit.

@ice1517  
@Crystal Neighybánya
 
It’s surprisingly easy to get Pinkie Pie to swear, but her swear words all get bleeped out and nopony hears them.
 
When Twilight, Trixie, and Moondancer are really pissed off, they don’t swear much, but have been known to do the other kind of cursing