There's never too much of this story!

10473623
Glad you are enjoying it, sir. Should be a lot of fun left to come.

... Let's not talk about that again...

10526056
This is the legit reason for the first coming of Pinkamena. In MFC she told several stories and they were all lies. She also said Pinkie Pie never existed and it was her putting on a fake smile all along. Not true. She took some brain trauma that crossed her wires and changed her on a fundamental level. So the real question is, when she tells this to Cozy later on, why are there no scars, knots, or wounds to prove that she almost died saving Equestria which led to the coming of Pinkamena? Cozy felt her head and commented she didn't feel anything.

You probably know the truth but I doubt you'd want to share.