Yes, all 3 of them (Articuno, Zapdos and Moltres) will be in Pokémon HeartGold and Pokémon SoulSilver.
you go to cerulean city and head east until you come to a strip of water then surf down to the powerplant and on the left side of the building is Zapdos.
You can't. It must be transferred from either red, blue, or yellow. HeartGold And SoulSilver too
If you mean how to consider yourself as beaten the kanto region in pokemon soulsilver, then you should find zapdos,moltres, and articuno. You should also beat Red (Ash Ketchum). Once you do that, you can catch Mewtwo.
The cool legendaries you can get in Soulsilver/heartgold are the following: Lugia, Ho-oh, Raikou, Entei, Suicune, Articuno, Moltres, Zapdos, Mewtwo, Latias, Latios (Latios in Soulsilver & Latias in Heartgold), Kyogre, Groudon, Rayquaza (Kyogre in Heartgold, Groudon in Soulsilver & Rayquaza if you have both).
you can find zapdos in ecrutak city
power plant
The power plant.
Yes, all 3 of them (Articuno, Zapdos and Moltres) will be in Pokémon HeartGold and Pokémon SoulSilver.
eat fish
yes, MOLTRES is in Pokemon soulsilver and heartgold. So are the other two birds articuno and zapdos
On Pokemon soulsilver, after winning all the gym badges, Zapdos will be waiting for you at the Power Plant.
After completing the game, go to the power plant. Zapdos should be waiting for you.
Outside the Power Plant after you defeat Gary/Blue.
to get zapdos, you have to go to the power plant, near cerulean city. Zapdos is next to the power plant
You need all 16 Gym Badges
They are not in Pokemon Gold and Silver. However, they are catchable in the remakes of Gold and Silver, HeartGold and SoulSilver.