yes they are preety rare in crystal they are really rare in gold and silver
NO!
Yes it is quite rare
get rare Pokemon and beat him with them!
Route 14, however, it is rare.
its just a rare Pokemon also its gyarados
Try using the pokemon gameshark code for rare candies: 01xx86d8 and replace the xx with 20 for rare candies.
No there is not who told you that? why did you believe them
they are rare in headbutt trees
They can be found in the dark cave but they are rare.
In Pokemon crystall Bill is the guy who makes the PC system and also likes rare Pokemon
Nothing... other than rare Pokemon like Larvitar (or Pupitar in Crystal)
You'll need to fish on Route 44; it is rare to find.