if it says that you cannot trade the Pokemon then it usually means that the Pokemon that you are trying to trade to Pokemon crystal is not available in that version.
and since you cant trade Pokemon that haven't been discovered yet in Pokemon crystal from newer versions well its like trying to explain to a caveman what a Iphone is it hasent been invented or discovered yet so they dont know what it is or how to use it
you cant you need to trade from red,blue,yellow,or gold
Answer:You can't as "Crystal" Pokemon do not exist in the games.well i would not agree with that... u can get a bellsprout at night and trade bellsprout for onix in violet city the house beneath the Pokemon centre... although u cant catch 1 because it doesn't appear but u can trade 1 =.=KeoL
you cant only if u trade from yellow red or blue unless u have game shark
You cant its impossible besides it would be a maricle if you can even find a cryastal or Yellow, Red, or blue they are very old
yes you can transfer a egg by link cable in the versions gold/silver/crystal. but u cant trade eggs to red/blue/yellow/green.
NO SORRY YOU CANT TRADE WITH POKEMON CRYSTAL AND FIRERED AND I HAVE TRIED AND IT DOSENT WORK YOU SEE FIRERED IS AN GBA(GAMEBOY ADVANCE) AND CRYSTAL IS GBC(GAMEBOY COLOR)AND THEY ARE'NT COMPITABLE TO EATCH OTHER SO SORRY DUDE I HOPE YOU UNDERSTAND :D:P FROM LOLPICKET
yes, Pokemon can be traded from different games by using Gameboy Advance SP. But Yellow can not trade with Crystal. Almost all of them from different regions cant.
you cant
you cant
u cant trade. migrate
You cant catch Articuno in Pokemon Crystal, only in Blue, Red and Yellow. But i am not sure about that.
Sorry, you cant catch Articuno in Pokemon Crystal, that can only in Pokemon red, blue and yellow i think.