Where is the sixth gym in Kanto in HeartGold?

the sixth gym is in cerulean city you have to battle misty it is very easy.

to get to the sixth gym you have to move snorlax by going to the radio tower in lavender town then talking to the man close to the elevator then going to the snorlax.

once you do use the radio thing and you know how you can choose what to listen to .

well use your pen and click the topof the circle it should say some kind of Flute make sure you can hear the sound then talk to the snorlax.next go through the cave beat brock then go to cerulean city.

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Actually, there isn't really a certain order to the gyms in Kanto, so it could be Cerulean, Fuchsia, Pewter, Celadon, Saffron, or Vermillion City, or Seafoam Island.