you can't you have to import them from Pokemon emerald
Trade with Pal Park.
After you get all three Reggies (Regice, Registeel and Regirock) there is not much else to do with them seeing as you most likely caught them on the pokemon sapphire/ruby/emerald game. For either Pokemon diamond, pearl or platinum you can trade the three reggies onto it and go to the sacred chamber place which is the town below the snowpoint city gym and with all three reggies in your inventory you can unlock an entrance which leads to Regigas (sorry if spelt wrong been a while since played) it is very powerful and is level 70.
nope cause all the other reggies will awake reggigas from his sleep.
yes Regies:use the Pokemon modifier cheat witch you can find on this site
No.
The 3 reggies are not in platinum they are only in the hoenn region unless you use cheats.
yes
find them!!
yes if u got the nat. pokedex 1in mt corenet,1 in a island , 1 behind the leugue,and 1 in snowpointtemple.put 1st three in party and go to the temple.then redgigigas will be awakened!
They are Dialga, Giratina, Darkrai, Cresselia, Azelf, Uxie, Mesprit, all four Reggies, and if you consider him one, Heatran.
FIND ALL YOU NEED IN UPOKECENTER.COM YOU CAN FIND THERE CODES FOR ALL
easy-find someone with it and thn migrate it- find it in the pal park all day scyther is not in Pokemon pearl