I'm having the same problem now in my Pokemon Crystal game. I've played through the game before, but I remember being able to "track" Entei and Raikou through my Pokedex and was able to catch all three. This time I caught Suicune pretty early after seeing them for the first time, but afterwards I noticed that I didn't have the other two dogs in my Pokedex (even though I had already encountered them all once in the tower). I managed to find and catch Raikou but not Entei, so I think that they must still be out there even though they're not in your Pokedex. Keep on searching and using repels in Johto and you'll probably encounter them sooner or later!
Hope this helps!
suicune
its suicune, the water type dog
You can get lugia, ho oh, entei, suicune and raikou
suicune, entei, raikou, 3 legendary dogs. then the birds, ho oh, lugia
suicune is top legendary dog just play Pokemon crystal and you'll see.
Pokemon Gold and Pokemon Crystal are very similar, but not the same. In Pokemon Crystal, you encounter the Legendary Beasts, Raikou, Entei, and Suicune, at the same time, but you only actually battle Suicune.
The legendaries that you can get are Ho-Oh and Lugia as well as the legendary dogs Entei, Raikou and Suicune.
Raikou, Entei, Suicune, Ho-oh, Lugia and Celebi.
Suicune is roaming in any grass found in Johto like the other legendary beasts. It isn't until Crystal that it gets an assigned location.
Suicune is not on Fire Red, Suicune is only found in Silver, Crystal and Gold versions. Suicune is one of the 3 Legendary Dogs, Entei, Suicune, and Raikou. Once killed the Legendary Dogs are gone forever, so it is important to capture them. They will be a great adaptation to your team.
when you have captured entei, raikou and suicune, you go to tin tower and talk to the trio GOOD LUCK!!!
Yes, Raikou is one of three legendary dogs which specify in Gold, Silver and Crystal. The others are Entei, a fire type, and Suicune, a water type.