You first need to get the hm move fly, which is given to you after you beat the 6th gym leader chuck, he,s a fighting type so pyscic moves work best on him
Teach a Pokemon Fly after obtaining the HM and choose fly when you select the Pokemon.
No Gastly cannot learn fly in Pokémon HeartGold.
Obtain it from a gym leader.
yes you can. you can fly back to the indigo plateau and then you can enter the Pokemon leagues again.
same just touch screen.
Cianwood city after defeating chuck
You can fly there or go west.
no
You Use fly and just fly there
you get hmfly in heartgold after beating chuck the 5th gym leader who uses fighting type in cianwood city..
Choose the Pokemon that has fly then press A on the fly choose a city or town and press A.
It depends on the Pokemon game version. It is different every version.