PinkieDash

PinkieDash is the femslash ship between Pinkie Pie and Rainbow Dash from the My Little Pony fandom.

Season 1
In this episode Griffon the Bush off, Pinkie Pie and Rainbow Dash bond by playing pranks on the other ponies, but when Rainbow Dash's old friend, Gilda the griffon, shows up for a visit, Pinkie gets left out.

Start with the episode, with Pinkie Pie and Twilight Sparkle spending time in a park, with Pinkie enthusiastically relating some story about Rainbow Dash's aerial acrobatics to Twilight, who is reading a book and not paying Pinkie much attention. Pinkie spots Rainbow flying up above and calls to her, but Rainbow Dash tells her "not now". Pinkie pursues Rainbow Dash and calls out to her, until Rainbow Dash slams into a mountainside and slides down next to Pinkie, who tells her she was going to warn her about it. Pinkie reveals that she was trying to find her so she could help in playing a prank on Spike. Using a nearby thundercloud, they wait for the baby dragon to exit the town square pavilion. Once Spike is out, upon a signal from Pinkie, Dash kicks the cloud to ignite a thunderous boom, scaring him. The scare causes him to hiccup repeatedly. After making sure Spike is okay, the two commence (Rainbow Dash and Pinkie Pie) a pranking spree on the rest of their friends. They use water colors on the apples in some of Applejack's apple trees, switch Twilight's pen ink with disappearing ink, and use sneezing powder on Rarity. At a nearby lake, when Pinkie learns that Rainbow Dash sees Fluttershy as their target for a fake squirting turtle toy, Pinkie Pie immediately stops her. She warns Rainbow Dash that Fluttershy is too sensitive for even the most harmless of pranks. The two end the day by pranking each other instead by Hoofbumb.

Season 5
In the episode Tanks for the Memories, Rainbow Dash tries to stop the arrival of winter, which nearly caused a disaster. Her friends later comes to her home, attempting to put some reason into her. Pinkie, Rarity and Applejack empathised with her, and cries alongside her.

Season 6
In the episode 28 Pranks Later..., after Rainbow pranked Fluttershy (who got throught some character development), Twilight and the others confront her about this, except for Pinkie. The pink mare is on Rainbow's side. But after Applejack tells Rainbow that whoopee cushion are a shortcut prank, the latter takes it a challenge and double down on her pranks. Everypony comes to Pinkie to convince Rainbow to stop. She reluntanctly agrees but is unable to talk her out of it. Rainbow's new prank is to replace the Cutie Mark Crusaders' cookies with ones filled with rainbow-colored filling, and she's determined to commit it.

Later, she comes to apologize, and find Pinkie in bed, visibly sick. Pinkie says that the cookies gives her comfort and freaks out when she doesn't have ones anymore. Rainbow flies away and help to sell the 'trick' cookies. But when the night comes, she sees that everypony who eat the cookies have been turned into zombies ! When she gets trapped the Sweet Appel Acres, surrounded by all Ponyville inhabitants, she apologizes. Then, Pinkie speaks in a normal voice, revealing that the whole zombie thing was a prank on Rainbow. Pinkie counviced everypony to go along with it, when she wasn't able to stop Rainbow.

Fanon
Pinkiedash is a somewhat popular ship. The two have good (and fun) chemistry. They also have blue and pink coat respectively. (And their eyes are each other's coat color.)

Fandom
Pinkie Pie/Rainbow Dash on AO3