Silly rumours over the years

ArrJaySketch
My Little Pony - 1992 Edition
Thread Starter - Started a thread with over 100 pages
Wallet After Summer Sale -
Birthday Cake - Celebrated MLP's 7th birthday
Artist -
The End wasn't The End - Found a new home after the great exodus of 2012

It seemed valid at the time, but the rumor that Derpy Hooves/Muffins (however you came to know her) would never appear in the show again after Season 2.
Summersong
Duck - Hates bronies, but is one. Go figure.
Hard Work - Merited Perfect Pony Plot Provider badge with only their own art
Perfect Pony Plot Provider - Uploader of 10+ images with 350 upvotes or more (Questionable/Explicit)
Best Artist - Providing quality, Derpibooru-exclusive artwork
An Artist Who Rocks - 100+ images under their artist tag
Artist -

aka Summersong
In an old pony RP I was part of, Rarity said that her parents died in a fire.
 
About a week later, Rarity’s parents appeared in the show. The episode began with Rarity waking up to a fire Sweetie Belle had caused. They lived, so far as I know.
PurpleSmart2

Twilight is best pony
I think nothing can beat that whole “Discord is Starswirl” rumor. Someone even “leaked” the supposed dialogue from some future episode all the way back in 2012, but it turned out to be completely made up. Ironically, Discord did turn out to be Grogar in the finale, so the idea of Discord pretending to be someone else was not that far off after all.
Interested in advertising on Derpibooru? Click here for information!
Champions of Equestria

Help fund the $15 daily operational cost of Derpibooru - support us financially!

Syntax quick reference: **bold** *italic* ||hide text|| `code` __underline__ ~~strike~~ ^sup^ %sub%

Detailed syntax guide