A sequel to this:

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Image tags: suggestive, artist:skuttz, derpibooru import, oc, oc:static spark, unofficial characters only, anthro, pegasus, blushing, breasts, bust, covering, covering breasts, heart eyes, image, jpeg, smiling, wingding eyes, wings

Paddy decides to give the physically regressed Optimus Prime to Shatter as a way for the two to bond, since they have a bad history together. And by the looks of it, Optimus doesn't seem happy at all, but at least he's not going to get killed. Bumblebee is in the same situation as he stands there in the corner, very unhappy, and in a pullup. Judging by the "height chart", the plan is to de-aged as well and the pacifier is probably going to do the trick, but he's refusing to suck on it, for now.

And yeah, Optimus' diaper is full anyways, so a diaper change is long overdue.

And this takes place inside the Castle Of Friendship. In my lore, this castle becomes a homebase. Bumblebee inherited it. My AU takes place at least 200 years into the future so that means, the characters we loved so much, are long dead, except for Princess Twilight and Spike. And yes, Princess Twilight has the extended lifespan curse (that alicorns have), so she's physically young.