Suicune, if i do remember correctly, runs off to the area right of Bills house north of cerrulian city (pardon my spelling)
Chat with our AI personalities
If you run away, you have to beat the elite four. Then, go to the burned tower and suicune will be waiting at the bottom for you. go to serebii.net for a more detailed "how to".
go to the burned tower, all 3 of legendary dogs are there you need rock smash to get to them after they run away go to the grassy area and it should be there:)
You just have to travel in and out of a house then look at your pokedex and if your in the same city go to patches of grass and WALK DO NOT run it will scare him away:):):)
after you get to vermillion city go past digletts cave and go into the grass and look down there should be a opening and go in there and carry on suicune is at the end of the path
Suicune is probably not on route 25 if you met him everywhere else because you haven't caught Entei and Raikou. If you caught them and Suicune still isn't there then look at the places Suicune was, then go back to route 25 WITH ENTIE AND RAIKU IN YOUR PARTY!