This is a jumbled mix of a few theories put into a single (hopefully coherent) story. Remember, this is just a theory. Back in Generation 1, when Pokemon was new and full of magic (before competitive-oriented generations came in to cheapen that experience), one of the greatest mysteries of Pokemon existed. X That mystery was Mew; ancestor of all Pokemon (disregarding local Sinnoh folklore), and at one point thought a myth, even to the players. Mew was the one true enigma of the franchise. Long ago, before Pokemon existed on Earth, a meteor tore through the atmosphere and crash-landed into what is now known as Mt. Moon. Inside that meteor was the fetus of what would eventually give birth to what is now known as the Pokemon world; Mew. If you remember, it was said that Pokemon had originated from outer space back in the old Gen 1 games and episodes; a point which is being further pushed with more recent revelations, such as Deoxys. Clefairy and Jigglypuff seem to hold a strong tie to this Moon Stone - Clefairy in particular. Both somewhat resemble the little pink fuzzball on a higher level than the others. "Fetus" is an interesting choice of words for Mew as well, as Mew is portrayed as a fetus/embryo, and surrounds itself in a pink bubble, which strongly resembles a placenta. The idea was to get across that Mew was the birth of all Pokemon, using its very appearance to subtly sink it in. Anyway, it is unknown if it was just one Mew, or many. If it was able to split itself into over 500 different species, it may be capable of asexual reproduction (which is shared by another Pokemon). Mew soon populated the world with many of its spawns in all shapes and forms. There was one Pokemon in particular, however, that Mew seemed to share the strongest connection with, and this Pokemon exists as yet another... lesser known enigma. One which hinted to the very existence of this elusive ancestor Pokemon. X Why Ditto? Well, if you look at their genetic make-up, both Mew and Ditto are the same. Both possess the genes of all Pokemon in existence, as is evident in their ability to Transform into any Pokemon (Smeargle does not learn Transform naturally, so it does not count any more than a Pokemon getting Transform via Metronome). Ditto are numerous, in contrast to the rare and elusive Mew... or is it? Is Mew really that elusive, or has it been right under our noses the entire time? Is Ditto really an entirely different Pokemon of its own, or is it simply a Mew that has lost its form? But... why would a Mew just... lose its form? Well if you look at it, Ditto is an amoeba-like Pokemon of an amorphous shape, which is able to assume the shape of anything it is able to interact with. These are all traits shared by stem cells, which may have been the idea behind the creation of Ditto. Stem cells have provided a vast amount of aid in the area of genetic engineering, and have been used for various genetic experiments. Experiments namely... "July 5: Guyana, South America. A new Pokmon was discovered deep in the jungle." "July 10: We christened the newly discovered Pokmon Mew." "February 6: Mew gave birth. We named the newborn Mewtwo." "September 1: Mewtwo is far too powerful. We have failed to curb its vicious tendencies..." X ... cloning. 4 diaries exist which give us some clues as to the existence of Mew, and the experiments that went on which gave birth to its ferocious clone counterpart - Mewtwo; an uncontrollable monster of immeasurable power. These diaries could be found in a visibly damaged mansion on Cinnabar Island, where said experiments and countless test cloning took place... [YOUTUBE]http://www.youtube.com/watch?v=vO83Nfm_Xbk[/YOUTUBE] ... the very same place where you find the Ditto. Spoiler: From here I'd like to venture off from my main point for a bit to talk about the man who had written these diary entries in the first place. This was the man who had lead the search through the jungles of Guyana, in search of the elusive Mew. His name was Dr. Fuji. X "We dreamed of creating the world's strongest Pokmon... and we succeeded." Dr. Fuji is not as cold-hearted of a man as he may have seemed in the First Movie. In fact, his reasons were not at all to create the world's strongest Pokemon. "All he [Giovanni] wants is to control the most powerful Pokemon the world has ever known. I of course want something more... much more." He wished to use these cloning experiments to aid him in cloning his own daughter, Amber, who had long since died and left him grief-stricken. [YOUTUBE]bRoLVZpheEs[/YOUTUBE] That was, until the clones of Charmandertwo, Bulbasaurtwo, Squirtletwo, and Ambertwo died in the development stages. Only Mewtwo survived. The topmost quote were Fuji's last words before he died at the hands of Mewtwo... or did he? Lavender Town is home to the first real concept of death in the Pokemon world. It has a building littered with gravestones where dead Pokemon are buried. The town is also home to probably the world's kindest Pokemon care-giver in the world. X Mr. Fuji is well-known for having great sympathy for Pokemon, and even provides a shelter to abandoned and orphaned Pokemon in Lavender Town. But did you know that Mr. Fuji himself is not native to Lavender Town? In fact, Mr. Fuji is actually from none other than Cinnabar Island, the very same place where the mansion exists where the experiments to clone Mew took place. Another interesting piece of information is that Mr. Fuji is friends with Blaine, who himself had worked as a scientist for Team Rocket, and was involved with the Mewtwo project to some degree. In the manga, Blaine and Mewtwo even came to share an actual physical bond, where they could not be separated for too long without being drastically weakened. Also, Mr. Fuji and Blaine both share a very strong connection with Mew. It is revealed that the two had both at one point been to Faraway Island, where Mew can be found. On Faraway Island, a series of messages can be found, saying that only someone who is pure of heart can find Mew. The author of the messages' name is smudged out, but "-ji" is still readable at the end of the author's name. Could it have been Mr. Fuji? Did Mew appear to Mr. Fuji due to his kind nature? Also, does this somehow have a connection to Dr. Fuji, who had also taken an interest in Mew? Was Mr. Fuji so adamant in taking a stand against Team Rocket's abuse of Pokemon because he himself had been guilty of the same crime at one time (albeit with pure intentions)? Mr. Fuji has a memorial building in Lavender Town now, where the graves of deceased Pokemon can be found. However, there are several chambers that only Mr. Fuji himself is able to access. Could those chambers be where the graves of Amber, Ambertwo, Charmandertwo, Bulbasaurtwo, and Squirtletwo can be found? To put it bluntly, is it possible that Dr. Fuji is in fact a young Mr. Fuji? Could Mr. Fuji have been involved with the creation of Mewtwo this entire time? X Anyway, back to the main point. Is it really a coincidence that Ditto and Mew also share the same color palate, with their normal color being pinkish (Ditto's is a mix between Mew's pink and Mewtwo's purple), while their shiny forms are both a baby blue? Is it also a coincidence that they are the same weight, meaning that both possess the same exact amount of matter in their substance? How about the fact that both have a similar stat spread, with Ditto's being a solid 48 all-around while Mew's is a superior 100 all-around? Or how both have a 5 in each performance stat? While Mew and Ditto share the same weight with other Pokemon, and while some other Pokemon have the same performance stats, and while other Pokemon have similar stat distributions, only Mew and Ditto have ALL of these factors in common, while the others just share one of the many factors with the two. Out of all of Team Rocket's countless attempts to clone Mew, only one was a success. This clone, superior to Mew in every way, lacked Mew's ability to alter its genetic make-up and transform into any Pokemon in existence. However, this is Ditto's one and only trait. Are Ditto and Mewtwo that different, or are both just two different results of Team Rocket's attempts to clone Mew? Is Ditto really a failed attempt to clone a Mew? Mr. Fuji being like the father of this event. Mew being the fetus. Mewtwo, based on perspective, being the human offspring, or the devolved fetus. And Ditto being the stem cells. Is there a connection between the 3, and maybe even the 4 (Mr. Fuji)? Perhaps that while Ditto seems like a rather weak Pokemon, it's actually been part of a much larger picture. Also, take note that while you find Ditto in abundance in the Mansion (more specifically the lab section), you also find an abundance of Ditto in Cerulean Cave A.K.A. The Unknown Dungeon - the same place where Mewtwo lives. X So what say you? Has your respect for the little genetic blob gone up a bit at least?