There is no code to fly anywhere in any of the Pokémon games. The only way you could do it is by using a third party Action Replay device.
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the code for shiny Pokemon
there is not one you can always just unlock it when you go there?!
buy an action replay ds and put platinum in and there should be a code to fly anywhere. there are a lot of better cheats, like the ultimate charizard cheat. so yeah. it's my first answer on wiki-answers so i hope it's good
There is no code. You have to go to Veilstone City and beat Team Galactic and the Gym leader. After that go to an opening in the left where you battled Team Galactic (Team Galatic Warehouse) and you will find the HM Fly.
IDK I am thinking about getting software to make one so if I succeed I will tell you