I as always will skip all the pages of threads (except the ones i already read) and post my theology on the pokemon mythology...
You really should have read the whole thing, or at least the last few pages.
Once upon a time a pokemon named Mew came from nowhere into this place we call world, since he felt lonely in this desdichated universe he though of creating more pokemons to be with him and to help him since hes only power was to create other pokemons he needed help...
Mew didn't come from out of nowhere. Read below.
So then he created three pokemon`s, Dialga, Palkia and Arceus, Arceus made the universe Dialga made the time and Palkia created two more universe to guard themself and other pokemons.
Mew couldn't have created these Pokémon. Arceus came from an Egg that was born of chaos. Arceus created first Dialga and Palkia, then Uxie, Mesprit, and Azelf. Those five in turn created time, space, emotion, knowledge, and willpower. Then the world came to be (probably Palkia's work), and the three mirage Pokémon gave the world their blessings.
But for Mew that wasn't just it, thats where he made then Kyogre and Groudon the one who made the earth and all the other planets, the reason why there are so many stars is because all the worlds they made that didn't worked so they blasted them, other than that they made one system (ours) that was regular and one of those planets was perfect for them (ours) so they just stopped and rested in here. Then Rayquaza came to create the ozone cape all over around the world
Groudon, Rayquaza, and Kyogre aren't capable of space travel. Mew is, so for your theory to be correct, Mew would have had to travel from world to world, creating countless Kyogres, Groudons, and Rayquazas. I really don't think that's what happened. Which came first (Mew, or Rayquaza, Kyogre, and Groudon) is up for grabs, though. Most likely Mew, since it was the first to originate from this world, but that's just a guess for now.
Mew was still unhappy because of the unbalance of this world, even though Kyogre and Grouden were sleeping like nothing everything was in total caos on the surface. Thats why Mew created now Ho-oh and Lugia to control day and night that was affected by Dialga`s time system (the so called 24 hours per day). but then that just calmed everything a bit so Mew realized he needed to do something else, he created the three legendary birds and the three legendary dogs each one of them assigned one special request personally by Mew, they cant actually die and there`s only one of each of them but in the series there`s no confluence on this because its the same one they show over and over just that they don't say it (like the fact that everything goes around Ash just one boy who is in the right place in the right time so he presences everything that there is to see in the pokemon world just by mere "luck").
Again, Mew didn't create Dialga. Also, Lugia and Ho-Oh have no connection whatsoever to the time of day. Also, Raikou, Entei, and Suicune's role has nothing to do with your theory. They are the judges who report back to Ho-Oh, telling about how the human race is so far. Remember, Lugia and Ho-Oh were chased out of Ecruteak City because of human greed. As for Ash, he's a chosen Trainer of legend, so I really doubt it's just luck that he and his Pokémon get to see all the legendary Pokémon.
Then after that the rest of the pokemons are fillers for Mew to play with (including Darkrai so dont flame me on this one xD just think of it, what funnier than seeing someone else suffering on hes own dreams?).
Cant think of anything else atm sorry guys but, that is an almost complete pokemon theology, just minor fixes here and there and its like perfect :P