Sunset Shimmer, in Equestria, Has to deal with being a part of Twilight Sparkle's team, per her request, despite her own feelings of inadequacy, regrets, fears, and worse of all, her newfound love for Twilight Sparkle. Can she ever earn it?
Sunset Shimmer, the Princess of Valor, is the happiest Sunset in all of the multiverse; A fact that will be painfully obvious to her, when she's cursed to travel the multiverse meeting other failed versions of herself.
The humble Peasant farmer Applejack has to travel across the kingdom to rescue Princess Rarity, for a chance to save her farm and family. Surely these two could never form an inseparable bond in this journey?
'Majesty' or so she calls herself, wants to bring back Alicorns to existance, and thinks it's her birthright to become one. Actual Alicorns, now disturbed, might have something to say about it.