B.B.B.F.F.B.R.

Twilight Sparkle has the best big brother in the world. Applejack has the best big brother in the world. They can't both be right. It's on...

When Twilight and Applejack have a falling out over who can claim to have the best big brother, each will stop at nothing to prove theirs is better.

And their brothers will stop at nothing to make their sisters happy.