I’m familiar with your thoughts on how the games try and paint Mew as the ancestor of Pokemon and how backwards their logic is claiming it’s due to Mew having the DNA of all Pokemon. That, as you’ve pointed out multiple times, is not how ancestry works.
I wanted to share with you an idea I’ve had about how I’d handle the Mew situation and what your thoughts about it are. For me, since Mew is the only Pokemon barring Ditto that can learn transform, I really like the idea that Mew could be the ancestor of all Pokemon, or at least the Mew species. In how I’d handle it, Mew would be #1 in the Pokedex and would be the original Pokemon that could change shape at will. As the curious creatures as they are, mews explored endlessly, tackling any environmental challenges by changing shape into the various Pokemon species we’re familiar with to suit that environment. Over time, those mew who grew older and decide to settle in their areas in whatever shape they were in, over thousands of years, lost the ability to transform and remained in that shape as whatever new species they were. Because so few environments are comfortable for Mew’s natural form, and/or so few mew continued to travel endlessly, modern day mews are fairly rare, hence their legendary status. This would really help explain a lot of artificial Pokemon since the mew that originally became that species took on an artificial form for one reason or another somewhere down the line, rather than Pokemon like Klinklang, Electrode, and Klefki existing and being able to breed in some degree for no particular reason.
What are your thoughts on Seadra’s extremely bizarre Pokedex entry that mentions the “presence of a gene not found in Horsea”? Other ridiculous Pokedex entries could be explained away as myths or mere exaggerations, but this one is implied to be based on actual scientific research. What do you think this could mean for Pokemon biology, and why do you think they chose Seadra out of all Pokemon to assign this piece of information to?
…huh. Y’know, I never noticed that before. That’s… odd. I think the reason the writers say this about Seadra in particular is because they want to hint at the gradual awakening of Horsea’s Dragon-type abilities as it evolves (note that this line first shows up in the second generation, when Kingdra was introduced). That doesn’t mean it makes sense, of course, but I think that’s what they’re trying to get at. They also note that this discovery quickly became “a hot topic” so they’re clearly aware that what they’re describing is an odd thing. Animals… shouldn’t gain extra genes partway through their life cycle. Bacteria can do it; a lot of bacteria have specialised enzymes that allow them to splice bits of DNA from other bacteria into their own, but animals can’t really do that because they have billions or trillions of copies of their DNA spread out over their cells. If an animal undergoes metamorphosis, all the genes that do everything the adult form needs should be there from birth; they just require particular stimuli to switch them on. Now that could be what this really means – that scientists identified a gene that wasn’t being expressed in Horsea but was in Seadra – but that doesn’t seem like it would be worthy of comment. So is it possible that something actually adds a whole bunch of extra base pairs to one of Horsea’s chromosomes when it evolves…? Hell if I know. If I had to speculate, I’d guess that there’s some symbiotic bacterium-like organism, possibly related to Pokérus (call it a midichlorian if you like), that goes through the body subtly altering the DNA of cells it encounters, and when the number of altered cells reaches a certain tipping point, the process dramatically accelerates and evolution happens. This is a total guess, based on real-world phenomena I happen to be vaguely familiar with, but if I were a Pokémon Professor I’d start with a hypothesis along those lines.