Where do you find Suicune in Pokemon Crystal version?

You can find Suicune in Pokemon Crystal by going to the Tin Tower in Ecruteak City after obtaining the Clear Bell from Goldenrod City Radio Tower's director. Save right before you go through the door. All three Legendary Dog Pokemon (Suicune, Entei, and Raikou) will be there when you go in the door, then Entei and Raikou will bound out the door, and Suicune will jump to you and the battle will start. Do not let it faint as there is only one Suicune. Restart the game if you have done so on accident.