How can you obtain Smeargle on Pokémon Crystal?

First you go to where the Ho-oh puzzle is located. ( go through the tunnel connecting azalea and violet city, [ by the entrance to azalea, take a left go all the way over].

Take a right go up to the ladder, you will come to a landing with water. follow the water up to to the top.

Go to the sides till you get all the way to the top of tunnel.

Go out entrance and go to grass) sometimes it helps to tune to the unown station and eventually you will find smeargle.

U can get smeargle, just outside the ho-oh puzzle in violet city, there should be a little line of grass, where you can also get natu, it's quite rare but you can get smeargle there, I did, it took me quite a few go's but also you need a stack of ultra balls and great balls hope this helps.

Woops sry I mean't the 4th puzzle, the squid like Pokemon puzzle, just b4 entering that puzzle roon there will b grass there which you can get smeargle and natu there, takes about 5-10 mins but well worth the wait for me.

It takes 4 eva! But there is a patch outside the one puzzle (can't check, did the puzzle ages ago)but you have to go through union cave to get to it. I've tried way over ten mins and I still havnt found it but I know it is here and I also keep almost breaking my bro's gba. If I break it then I wont be bale to play the game.