Zitat von serebii.net
Hoenn Pokémon
To get Hoenn Pokémon, all you need to do is turn the PokéGear Radio onto the Pokémon March station on a Wednesday. On Wednesdays, the Pokémon March Channel is the "Hoenn Sound" show. If you have this playing while going through the areas and the wild Pokémon may be a Pokémon whom is originally from Hoenn.
Sinnoh Pokémon
To get Sinnoh Pokémon, all you need to do is turn the PokéGear Radio onto the Pokémon March station on a Thursday. On Thursdays, the Pokémon March Channel is the "Sinnoh Sound" show. If you have this playing while going through the areas and the wild Pokémon may be a Pokémon whom is originally from Sinnoh.
There is one problem with this method however, you have to switch the radio back to the station after each battle so there may be some back and forth going if you're hunting for a specific Pokémon.
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