you can't.
no
Nope. sorry
Yes but don't trade pokemon only from crystal to red for example don't trade a lugia in red or else ur game will get messed up but u can trade any other pokemon that were in red from ur crystal
EDIT: I'm not sure either. i tried to trade from crystal to leaf green, and it didn't recognize that i was trying to trade. im not completely sure i think you have to have two-hundred Pokemon on fire red then you can trade from Pokemon crystal.im not sure you can do that with crystal
the only way to get mewtwo is to trade it from Pokemon red,blue,or yellow. in leaf green and fire red he is in cerulean cave cheat codesxD
It is not available in Pokemon Crystal. You will need to trade for it from Pokemon Red, Blue, or Yellow.
trade it from red,blue, or yellowMewtwo is not catchable in the wild in Pokemon Crystal.
You can't find Charizard in Pokemon Crystal. You have to trade it from Pokemon Red, Blue, or Yellow.
You cannot catch Mewtwo in Pokemon Crystal, but you can trade it from a Pokemon Red or Blue. Hope this helped :)
Trade it from yellow/red/green.
Yes, Pokemon Red can trade with Red, Blue, Yellow, Gold, Silver and Crystal.