No
No you cannot trade from Game Boy Color And Game boy Advance.
Leafgreen and Firered, Pearl and Diamond
no you cant get articuno in emerald the only way you can get it is by trading from firered or leafgreen versions no you cant get articuno in emerald the only way you can get it is by trading from firered or leafgreen versions
You must trade it from Emerald, FireRed, or LeafGreen versions.
No
You trade with Ruby Saphire or Emerald.
no its not that hard. its the same story plot.
you can get Pokemon that are not in the other version
That would be FireRed/LeafGreen/Ruby/Sapphire/Emerald.
Crystal is for GameBoy Color, but the others are for GameBoy Advance. The older games weren't meant to interact with the newer.
No. Riolu did not exist during Generation III, which was the generation Pokemon FireRed & LeafGreen versions were set in.