you catch it at night
yes if you can find them
at night in sprout tower or in route east of Violet city.
On route 29, just after the first town, New Bark Town. You can only catch Noctowl at night though, that might be why you're having trouble.
First, you need to catch a Ghastly, which can be found in the sprout tower or caves at night. Evolve it into a Haunter and then trade it. At that it will evolve into Gengar which you need to have it traded back to you.
you catch it at night
From the sprout tower at night.
yes if you can find them
It doesn't matter when you catch them.
at night in sprout tower or in route east of Violet city.
Is a little hard, you can find him just in the Ice Pathat night.
go in the grass by celadon or saffron make sure its night go in the left exit go up you can catch a murkrow or a houndour
On route 29, just after the first town, New Bark Town. You can only catch Noctowl at night though, that might be why you're having trouble.
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 can catch Hoho at night.
in the ice path at night
In Ilex Forest at Night time.