4 points
*
My Little Pony?
I think in G4 bloodlines were brought up only twice: once indirectly with character named Blueblood, which was complete idiot, and other time when Pinkie and Applejack turned out to be distant siblings.
In G5 movie there was pegasus family that was saying they are royals because their family can fly, while others couldn’t, but actually
G5 spoiler
they were faking it, nopony had any magic.