You must obtain the National Pokedex. (And it's PAL Park, not Pearl Park.)
He is the sleeping pokemon blocking the entrance to cycling road and past vermillion city
Complete the pokedex.
complete the pokedex !
you get the National Dex.
It is in the Eterna Forest, near the Eterna City entrance.
there is another entrance on the left
It Is A Kecleon.
That guy isn't blocking the door. It is the entrance to the Eterna City entrance. The correct path can be found by going straight and rock climbing when you are outside, instead of taking the door to your right. Just retrace your steps and try again.
He is the sleeping pokemon blocking the entrance to cycling road and past vermillion city
Complete the pokedex.
There is no code. The secret entrance with the maids blocking it cannot be acccessed. Its just there to puzzle people i guess.
you get the National Dex.
complete the pokedex !
eterna forest, near the eterna side entrance
go in by Hearthome city
get the national pokedex
You have to get all eight gym badges