The news people are steal there
How Do I Get The 5th Gym Badge On Pokemon Platinum?
Head to Pastoria City (south of Veilstone) and defeat Wake. He is strong in the water type so zap him with electric and you should finish him no problem.
You get it by going to hearthome City and going in the tunle thing where the news casters where blocking you. :) :)
You defeat wake(pastoria gym)
Oh I know you got to beat the gym leader first.
You have to die!111
You got to suck a nut