well you can get every Pokemon on the game not catch all 493 but if you do enough trading you can get all 493 and all 493 can follow you for more info got to http://pokebomb.co.cc
Yes, all 493 can follow you, but only one at time.
Yes.
493 different ones, but for all in total... Unknown.
HeartGold & SoulSilver do not introduce any new Pokémon, so the current total of 493 still stands.
Yes, all 3 of them (Articuno, Zapdos and Moltres) will be in Pokémon HeartGold and Pokémon SoulSilver.
No Yes and you can find action replay codes for the action replay for heartgold ans soulsilver all over the internet.
In HeartGold and SoulSilver you can register all the phone numbers!
Unfortunately not.You can use the Pokemon modifier though!It's useful!
with an AR
Show it to Proffeser oak
Yes You can get all your pokemons shiny in 2 weeks if you catch all pokemons with Heavy Ball( For Heart Gold) or Ultra Ball!
Yes all Pokemon can follow you onheartgold and soulsilver. Think of a blastoise following you.ahhhhhhh!!!