Well in heart gold you can use a action replay or just find them like everyone else so I hope i answered your question.
There is none.
Assuming you mean Heart Gold, it would be all of the same Pokemon as in the old gold silver and crystal games. with the exception of ho-oh as being the only legendary available. they are known as the Jhoto Pokemon
yes & like all other legendary Pokemon beat the elite 4 to rematch any legendary Pokemon you ran from, defeated, defeated you or if it fled.
There isn't currently a code for all of the legendary pokemon, but they each have individual codes in Heartgold DSi Action Reply. check out this guy's channel on YouTube. He has most of the legendary pokemon DSi Action Replay Code for Heartgold. ☺ :)
In Pokémon Gold for the Gameboy Color, the Legendary Pokémon that were available are Entei, Raikou, Suicune, Lugia and Ho-Oh.
NOBODY CARES.....(if you mean suicune,raiku, and einte they run around all of the johto)
Go defeat the elite four again and all non caught legendary Pokemon reset
Master ball or timer ball. Ultra balls aren't very effective against legendary.
If you mean legendary, then its the following: lugia, ho-oh, entei, raikou, and suicune. The legendary Pokemon only in soul silver are: groudon and latios; heart gold: kyogre and latias. Mewtwo is available in the games as well. All of these legendaries are available WITHOUT cheats or any kind of event.
just look around and hope you get lucky
Well Just catch them if you want to know their location just goto http://Pokemon.marriland.com/hgss/pokedex/ i don't own it Hope i helped
Pokemon Gold has the same rules for breeding Pokemon as do all other Pokemon versions. You can only breed non-legendary Pokemon of the same species and of different genders. You can also breed a Ditto with a non-legendary Pokemon. There are rumors about breeding shiny Pokemon with legendaries, but a cheat code from action replay is necessary to do so.