What the hell, Rainbow Dash? Rarity? FLUTTERSHY? WHAT. THE. FUCK.
There's just no excuse. NONE! I mean, yeah, okay, Pinkie Pie might forgive you with a lame apology like that, but --
You should be banned from EVERY CAKE!
That said... Pinkie Pie and Twilight's investigation was the hilight of the show, which is good since it was also the bulk of it. Pinkie's insane theories contrasting with Twilight's actual investigation, and them switching hats and bubble-pipes as they changed roles.
"And YOU can be the lowly assistant who asks silly questions with obvious answers." "So... should we look for clues?" "A perfect silly question! And the obvious answer is..." "Yes?" "NO!"
Not that there weren't some other funny parts.
"Take that, thief! I won't let you get away, thief!" *CLANG* "Are you okay, thief?"
The ending kind of ruined it for me, though.
BANISH THEM! Banish them and then THROW THEM INTO A DUNGEON IN THE PLACE YOU BANISH THEM TO!