Answer:
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 the girl will talk to you then go back to the gym.Now you can challenge the gym.When you beat her she will start to cry.try to walk out and the lass girl will talk then go back and Whitney will give you a badge and the TM attract.The go next door to the flower shop talk to the lady she'll give a squirt bottle then go to route 36 and use the squirtbottle on the tree its a sudowoodo capture it this is the only chance you get for one.
Hope this helps.