You can't trade any Pokemon from the ds game to the gameboy game but you can trade from the gameboy game to the ds but it is irreversible. to do this you must finsh the game and see all Pokemon in the sinnoh pokedex then return to the lab.
answer from androsjl
if you mean can you get Pokemon from pearl and diamond and trade them to ruby so you can get diamond and pearl Pokemon on ruby. then no you can not. but you can migrate ruby Pokemon. you put the Pokemon in ruby that you want to put on diamond or pearl in the PC. save it turn off. then go to diamond and migrate them. must be in ds at the same time. pal park.
You have to trade or migrate it from Ruby, Sapphire or Emerald.
you have to have a us bonus disc of Pokemon collosseum trade it to ruby sapphire or emerald but if you have Pokemon diamond or pearl you will have to migrate.
You can't. You can only get jirachi in ruby and sapphire. You would have to trade from ruby or sapphire.
trade it over from emerald or ruby and Sapphire
It is possible to obtain a Custap berry in Pokemon Pearl. To get it you have to trade from Ruby, Sapphire or Emerald version.
the only way to get groudon is to either import it from Pokemon sapphire/ ruby/ or emerald, OR, trade it from pearl/diamond/or platinum.
you need to trade from ruby,sapphire or emerald
You cant, You have to trade it with someone who has saphire, or ruby
you can't. trade with someone who has a ruby, sapphire, or emerald version
Migrate from Ruby (or Sapphire/Emerald) or trade with Platinum
No. But you can trade from FireRed, LeafGreen, Sapphire, Ruby or Emerald to Diamond, Pearl or Platinum