How did the pokemons created

Are you guys think like Arceus first created Dialga and Palkia and Giratina or do you think there is Mew too? To someone thinks there were Mew too they are thinking there was Mew's many of them and they were evolved to the other pokemons and the other pokemons were created like that. And some of them were legendary pokemons that are lucky. So all the pokemons come like that? Maybe. I don't know. But i don't think it was like that ithink Arceus created all of the pokemons. And i think there is only one Mew. Comment downs below what do you think and why.