Pinkie had just finished making a 6 layer cake and was putting the finishing touches. The Cake twins giggled and climbed into her mane.

Pinkie: Aaaaaand done!

Mrs. Cake: Oh thank you, Pinkie Pie! Everyone at the town hall will be so delighted!

Pinkie: Eh, no biggie! It was nothing! It's just what I do!

Mrs. Cake: No one does your job the same way you do.

Pinkie: *giggles* Stop it!

But things took a turn for the worst rather quickly, when Pinkie woke up the next day, she screamed at the top of her lungs.

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The rest of the Mane Six hurried to Sugarcube Corner later.

Rainbow: What's so important that we have to be here so early? Celestia hasn't even raised the sun!

Twilight: Well, whatever it is, it must be an emergency.

Pinkie opened the door and pulled the girls inside.

Rainbow: Ugh...what is it, Pinkie? Lemme guess, the cake twins went missing and you thought they were kidnapped only to find that they were hiding in your bedroom.

Pinkie: Worse! Somepony stole my cake!

Everyone groaned in frustration.

Applejack: Is that what this is about, sugarcube? A missing cake?

Pinkie: I spent 7 hours making that cake! It was meant specifically for the town hall, nopony else!

Rainbow: Are you sure it was stolen?

Pinkie: I'M THE ONE ASKING QUESTIONS HERE!!!!

Twilight: You didn't ask any questions.

Pinkie: NEITHER DID YOU!!!!

Rarity: Darling, are you sure you're not exaggerating?

Pinkie: ABSOLUTELY!!!! ALL OF YOU ARE GONNA HELP ME FIND THE CULPRIT!!!!

Rainbow: ...Not it!

Rainbow Dash took off flying.

Pinkie: That was the nicest thing she's ever done.

Twilight: Um...Pinkie, do you even know what happened?

Pinkie: When I woke up, the cake was gone!

Twilight: Okay...anything else.

Pinkie: ...That's it, I woke up and it was gone.

Pinkie studied her friends thoroughly.

Fluttershy: Um...what're you doing?

Pinkie: Making sure none of you stole my cake! Making sure there isn't any frosting on your faces!

Twilight: Pinkie, that's preposterous! We'd never steal something you worked so hard on!

Pinkie: Oh really...

Twilight: Really!

Pinkie: Just making sure...but I've got both of my eyes on all of you.

Fluttershy: Um...I better go, it's time to feed Angel.

Applejack: Uh yeah, got a lotta chores to do on the farm. It's apple bucking season.

Pinkie: Fine! If you don't want to help me find my cake, I'll find it myself!

That's exactly what Pinkie did, she spent all night staring at the rest of her cakes making sure she caught the thief red-handed.

Pinkie: You're not gonna get away from me, Cake Thief! Not with Pinkie Pie on duty!

But things didn't go the way Pinkie wanted them to. After several hours, Pinkie couldn't stay up any longer and she dozed off. When she woke up, more of her cakes were missing. The kitchen was also a bit of a mess.

Pinkie: NOOOOOOO NOT AGAIN!!!!

Rainbow Dash flew in and saw the mess.

Rainbow: Pinkie, do you-whoa, what happened here? Looks like a stampede came here.

Pinkie suddenly grabbed Rainbow Dash by the face.

Pinkie: MY CAKES ARE GONE, DASHIE!!!! GONE GONE GONE GONE GONE!!!!!

Rainbow pushed Pinkie away.

Pinkie: Did you take them, Dashie?!

Rainbow: I just got here, so that's a no. Pinkie, why are you taking this so seriously? I don't think it's as serious as you think.

Pinkie: How would you feel if Tank was missing, Dashie?!

Rainbow: He is missing...in the winter. But this is cake we're talking about, it could be that someponies are just picking them up or something.

Pinkie: HOW CAN YOU BE SO CALM AT A TIME LIKE THIS?!?!?!

Rainbow Dash suddenly noticed something on Pinkie's face.

Rainbow: Um...Pinkie, is that frosting on your face?

Pinkie looked confused, she rushed off to find a mirror.

Pinkie: *gasps* You know what this means?

Rainbow: That you've been-

Pinkie: The thief tried to frame me!

Rainbow: What? No, it could be that-

Pinkie: The thief might be closer than we think, Dashie!

Rainbow: Ugh...if I help you, will you promise to stop yelling in my face every 30 seconds?

Pinkie: Cross my heart and hope to fly, stick a cupcake in my eye!

Rainbow Dash rolled her eyes, knowing what she was getting herself into. That night, Pinkie used the exact same method as the night before. Rainbow Dash was sitting on a chair upside down.

Rainbow: And why are we doing this?

Pinkie: To catch the thief red-handed! It could be Mr or Mrs Cake! Or even Pound or Pumpkin! Or worse, Gummy!!!

Rainbow: Gummy doesn't have any teeth, Pinkie.

Pinkie: Huh, that explains a lot.

But pretty soon, Pinkie dozed off again. Rainbow Dash almost did too, but she caught the thief red-handed.

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Pinkie was in for a shock the next day as to who the thief was.

Pinkie: The thief is ME?!?!?

Rainbow: Yup, you've been sleep-eating the past few days, that's probably why your cakes have been disappearing a lot lately.

Pinkie: What a relief! Good to know that-Hey, that means I have to make all those cakes again!