TWILIGHT: "Would you look at that, Spike! Our opening screenshot shows off that most useful of animation principles - smearing! Okay, it's mostly wind, but it counts! How often do you see that in Flash?"
SPIKE: "..."
TWILIGHT: "...you don't know what smearing is, do you?"
SPIKE: "...No..."

APPLEJACK: "What does this mean, Pinkie?"
PINKIE: "Not sure, but I've had this doozy every week on Saturday evenings for the last six or seven weeks. Maybe it means someone somewhere is writing up about our adventures?"

"Listen up, dweeb, it's not my fault they never brought me back after Season 5. That doesn't make me any less important then the other originally-one-time character from these pair of episodes! You got that, you pink puffball?"

FLUTTERSHY: "You know what they say, my poultry friends. It's always the quiet ones. You don't want to know what I'll do when I get really angry. Let's just say a dragon made me angry, and he didn't like what I did."

TWILIGHT: "Hm. Feels like this would be a good point to insert a meta-joke about how I look very much like my future Princess self in this shot, with the glowing heavenly/demon eyes and everything. Here we go -"
APPLEJACK: "No, Twilight, no we're not doing that, sugarcube."

RAINBOW DASH: "I look like I have a mohawk blowing in the wind, don't I? Yeah, I think I just got about 20% cooler."
FLUTTERSHY [off-screen]: "What? But, um... I thought you said it was lazy and uninspired to just quote fan-loved moments for these intros..."

FLUTTERSHY: "I'd like to be a tree."
RAINBOW DASH [sighs]: "Fluttershy, I'll let you off this time because that's such a iconic, fan-loved moment, but we need to have a serious talk about how to do these captioned intros."

RAINBOW DASH: Still think I'm all ego and hype? When Rainbow Dash says she's the most athletic pony in Ponyville, she means it!

TWILIGHT: "Winter Wrap Up, Winter Wrap Up, our song is so iconic that even the show itself referenced it twice in Season 4!"

One of these things is not like the others,
One of these things just doesn't belong,
Can you tell which thing is not like the others
By the time I finish my song?

FLUTTERSHY: "It's exactly this kind of weirdness that put me off poison joke. Though sometimes I mix it into Angel's carrots when he's been misbehaving."

DIAMOND DOG: "My... precious..."
RARITY: "Oh, please, not-darling, that reference is so overdone."