what do you think, adms?
You told to us that there mew in game and we can cacth him.
You could to put many easter eggs in game, npcs with tips in determinate hour...
If someone beat ash in celadon ( and it is possible), he got the first information of mew... for exemple: " someday i saw a pink pokemon in kanto..." look, with this information, we know that mew dont appears in jhoto..
And put many others easterggs, hidden informations, for exemple, i clicked in a random rock and appears a information : the lendary pokemon appears in morning..."
needs to improve more this idea, but, what do u think?
sorry for my bad english.