Yeah, I did forgetting about Pound Cake and Pumpkin Cake.
Though, after you said that, I actually started thinking about it, and I've rewatched Baby Cakes, and I've noticed that Pumpkin's magic didn't start becoming a problem for Pinkie Pie until after she refused Twilight's offer to help her out. Also, Pumpkin's magic aura is a similar blue to Rarity's magic aura (Rarity's is #77CEF9 and Pumpkin's is #9FCADA) , and I thought, "What if the magic we saw Pumpkin do was actually Rarity's doing?" So, what if after Twilight had her offer to help Pinkie refused, she wanted to teach Pinkie a lesson? That lesson being: don't bite off more than you can chew. Twilight and Rarity saw how excited she was about Pound and Pumpkin in the opening scene, so what if the whole thing where Carrot Cake and Cup Cake having to leave in a rush, desperate for a foalsitter, and the rest of the Mane Six being preoccupied was all a set up? Rarity herself said that baby unicorns have magic surgers, so it was a good cover for her to do Pumpkin's magic without Pinkie getting suspecious.
Also, at the end of the episode where Carrot Cake said, "We had no idea how responsible you reallly are!" it didn't sound geuine. Rather, it sounded like he was saying that like he was instructed to say it. Here, take a listen: [LINK]
And Carrot Cake and Cup Cake winked at each other, as if to say, "Yeah, she got the message". And even Pinkie's letter to Celestia reflects that.
What do you think of all that? Sorry if it sounded like I treating this like it was a conspiracy.
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How good with computers are you? Out of curiosity, do yo have a custom computer setup?
Speaking of computers and OCs, what do you think of the idea of a pony OC(s) being more technological?
Mine is.