You don't. On certain days, the radio will play Hoenn music so you can see Hoenn Pokemon. But you can't get the map.
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Look on your map.
you must be talkin about Pokemon soulSilver or heartGold. no there is not a pass to go to hoenn. hoenn is not in the game. sorry -RR14
You can only get it in the Hoenn Field in the Pokewalker.
go to the radio on wedsdays and got to the places where the poke dex says hoenn pokemons are
No you do not need to catch Kyogre. You can get a Hoenn starter from a guy named Steven in Kanto.