Give them to the warden.
Pokeglitch20
It's on Route 20 (use the Dowsing Machine).
Crystal, Silver, Red, Blue and Yellow (When Red, Blue and Yellow trading, you use the time machine at the right of the connection center)
Yes there is a special time capsule trading machine in Pokemon gold at the top of the goldenrod city Pokemon center if i remember correctly you can use that machine to trade with Pokemon blue, yellow and red version.
As you may know, Masterball is the best ball. I have both yellow, silver and gold. After I got the Masterball in either silver or gold, I traded with yellow. By making a pokemon hold the Masterball you trade it and in yellow you can clone it to have more of the best ball in the world. I would guess that Masterball is a lot easier to use when catching Mewtwo that a pokeball.
you can use it for jewlery, money, and tooth fillings.
Must be traded from Blue, Red, or Yellow. Another way to obtain Articuno is to use Gameshark cheats.
all of them
No, neither one of these pokémon are in Gold. If you want them in Gold, you'll have to use the Time Capsule, or in the past you could also get them from an event. You can find Zapdos at the Power Plant in Red/Blue/Yellow, Articuno at Seafoam Islands in Red/Blue/Yellow and Moltres at Victory Road in Red/Blue/Yellow.
use a Pokemon to get to use "surf" then get to cinnibar island and there you go.
fire red cheats do not work on Pokemon shiny gold
use the poke-flute to move them
You can get it in Cerulean but pikachu won't let you use it on him in yellow.