How do you get goldenrod city?

After you beat Gym Leader Whitney of Goldenrod City, go to the flower shop which is to the right of the gym. There will be a girl there. Talk to her and she will give you the Squirtbottle. Then go...

battle your way through trainers then you need the squirtbottle to wake up this pokemon that is blocking the way to ecruteak city. then you wake it up then it is a wild sudowoodo.

After getting your second badge in Azalea Town, head west. Silver will battle you just before you leave. After you beat him, enter Ilex Forest, and talk to the boy who lost his Farfetch'd. Go up...

After getting the badge from Whitney, talk to the woman in the flower shop in the top right area of town. She will give you a Squirtbottle. Once you have it, talk to the moving tree (a Sudowoodo)...

First you go to the radio tower (the building with the giant satellite on top) talk to the girl on the far right counter she'll give you some questions. get them right and you'll get a radio card and...