I went to deliver Steven his letter. After that I did some grinding. Then I defeated Brawly and went to Staleport. Did the Team Aqua stuff and then battled May while going to Mauvile City. Then I got my Acro Bike, which I think is the better one, and then defeated Wattson. I went to Vendrauf (or whatever it's spelling is) Town, went north to Mauvile City, and explored the east part to it too.