in the tin tower in eucruteak town.
To trade Pokemon from Pokemon Crystal version to another version of Crystal you need to use a link cable. You can also battle this way.
In Pokemon Crystal Version, a Heracross will occasionally appear when you use headbutt on trees.
You Use fly and just fly there
If you can trade Pokemon from crystal version to gold version my guess is yes
Registeel doesn't exist in crystal version.
Crystal version.
You have to use a leaf stone to evolve weepinbell into victreebel.
On the top of tin tower. You need the rainbowwing to see him however.
You need the rainbow wing and the a strong friendship of your pokemon.
you get the rainbow wing from the president in the radio tower along the lines of the story
Clefairy doesn't evolve by level, you'll have to use a moonstone on her.
Yes