GameFreak getting lazy?

[Mega Heroes]

...Let me rephrase that.

Someone can create somthing, but you can pass down the rights of the creation. And mew is the ancestor of all pokemon. So maybe, Arceus used mew to create Dialga, Palkia and the Pokemon of the universe. In other words: Arceus is the painter, and mew is the brush.

So... Arceus -> Mew -> other Poké
-> = Create's

Or could it also be...
Arceus -> All Legendary's (the ones who cannot be used in Battle Tower) ->(Mew did this!) Other Pokémons.

I think i go for option 2 :>