Well. That was something.
I liked it overall, though I will say, as someone who's always found Weird Al funny but was never a huge
fan, some of the antics might have been lost on me, because there were times where it just felt like a bit TOO much. Not in the usual "Pinkie Pie you are so random!" way, but in more of a pure "uh... ok O_o" kind of way. Was the momentary live-action shots of Gummy and Boneless a reference to something? If not, then... what
I also frowned when Rainbow Dash plainly said "Yeah, Pinkie's parties are good, but..."
However! The episode redeems itself fully by hitting that right on its head (the Dash thing, not the Weird Al thing) later on, and shifting the focus from wacky antics to actual character development, with Dashie outright admitting that she'd gotten caught up in the hype and said something hurtful. I liked that. And I liked the reconciliation, and the revelation that Pinkie had inspired Cheese in the first place, and
the fact that they gave Pinkie a serious moment where she sees past all the antics and silliness that she's usually all about and realizes that if someone isn't enjoying what's happening, then it's not worth it.
So, in the end, I still give it a 9, even though it came perilously close to losing me during the early-to-middle portion of the ep.
Also, during Cheese's flashback, filly background ponies. Filly background ponies.
I squeed, I really did.