Where are the people you can trade with in Pokemon Crystal?

Answer 1

In Pokemon Crystal I only know of three people who you can trade with.

There is a house next to the Pokemon centre in violet city, in that house is a person called Kyle, if you give him a bellsprout he will return with an onix.

Then there is a house just outside blackthorn city, near the Ice Path there is a lone girl inside she wants dragonair and will trade a dodrio for it (totally not worth it as you can catch doduo in the first patch of grass you come to when you are sailing to Kanto)

At the end there is a fisherman in a house near the lighthouse in Olivine City which wants to trade his voltorb with a krabby...

Hope i helped!

Answer 2

In Pokemon crystal, a trade can be accomplished through the following steps.

1) Have two of any of the following: Game Boy Advance, Game Boy Advance SP, Game Boy Color

2) Other than your Pokemon crystal, have a copy of any of the of the following: Pokemon Gold, Pokemon Silver, or Pokemon Crystal

3) Insert the games into their respective systems

4) Upon entering the game, go into the Pokemon center and head to the top floor.

5) Hook up both game systems with a Gameboy Link Cable

6) Find the receptionist who will allow you to enter the "Cable Club Trade Center"

7) Once you are both inside, you will be able to select Pokemon to trade.