This was quite an unexpected story @Oculusfluffy but I was extremely excited to see this story flesh out the concepts of custom fluffies and also Amy and Princess (version 1.0???) being featured. It really does mean a lot to me.
When I did the picture of Amy asking for the custom fluffy, I did consider how that was actually executed. Although earlier generations of fluffies would very likely have been artificially created with a mish mash of experimental bioengineering techniques more akin to a garage start up.
I consider contemporary fluffies very much like any other animal pet. They would be able to reproduce normally. So the “created not born” aspect of fluffies would have been relegated to legend and as an obscure origin story.
I had considered very careful selective breeding as the way in which custom fluffies, as depicted in the 4 winged princess drawing could be produced. But that would take too long and with a low probability of success. So the whole concept of custom fluffs remained unresolved in my head. I left it at that, didn’t think much more of it.
So you can imagine how reading your story, seeing the care and skill taken to craft these wonders of bioengineering, I was immediately on board with the concept. It filled the gap I had in explaining an extreme example of designer fluffies. Not to mention it reminded me strongly of replicants in Bladerunner and their artificial memories. The below scene from BR2049 comes to mind when the Princess memories are crafted…
I would also imagine that custom built fluffies (though costing an arm and a leg) are looked down at by those in the fluffy breeding community elite. It’s a case of using money to circumvent the art and process of selective breeding, the type of prestigious and high end hobby depicted by the Blueberry and Cabot piece.
Oculusfluffy will have to confirm, but Bullsquid from the Avocado story may have been a built fluffy. He certainly fits the mold of a fluffy whose personality may have been shaped by the memories he was imbued with.
Canonically speaking in regards to the Avocadoverse, Amy doesn’t get her designer fluffy even though her dad’s finger may have slipped 
. Disappointingly getting a bike, but eventually encountering Princess Pinky at a common pet shop later on, shapes her character and may have taught her a lesson on patience and expectations in life. There is actually a bit more to Princess Pinky, Amy and her parent(s) that I am in the middle of writing, but I’ll hopefully get to show it sometime in the future instead of babbling about it now 