Any where you want with the exception of Mt. silver ,pallet town, Pewter city, and Viridian city.
I do not know where he is after beating elite four soul silver. I hope to find him soon.
hacks. and pokemon that are able to evolve with the dusk stone won't until you get the new pokedex (after beating the elite four)
beat the elite four.
Yes you can.
Yes
To face the elite four at indigo plateu
I just finished beating the elite four without trouble. I used Feraligatr, Meganium, Typhlosion, Ampharos(great Pokemon for the elite), Lugia(also amaing for this) and alakazam
in what game of Pokemon
FAP
You find him in meteor cave after beating the elite four.
Beat them and the champion
You can Magmar at the Burned Tower. Go to Kanto ,after beating the Elite Four, Magmar will also spawn in the Mt. Silver.