raikou
Only the rare species of the Entei, Raikou, and Suicune can understand humans on a constant basis. But there are other species that can only understand the humans after your Pokemon eat the rare poffin found only in Saffron City. Hope this helps!
raikou cannot be caught on Pokemon ruby
Starter:Charmander-Suicune Squirtle-Raikou Bulbasaur-Entei
If Raikou faints, go to the Burned Tower . Then you see him. Same as the other legendary dogs however Raikou will only regenerate if you defeat the Elite 4 and Lance, once you have caught Raikou, it will no longer regenerate.
entei,raikou,suicane,lugia,ho-oh etc
for entai and raikou they are special random encountors suicoon is a sidequest
the rare Pokemon u can get in leafgreen/fire red is sucince raikou entei aritcuno moltres zapdos mewtwo ho oh lugia and there might be more
The legendaries that you can get are Ho-Oh and Lugia as well as the legendary dogs Entei, Raikou and Suicune.
There is no real way to get Raikou to come to you. You have to keep trying to get to Raikou. It is lucky if you encounter Raikou.
ho-oh, lugia, articuno, zapdos, moltres, entei, raikou, suicune, latias, kyogre, rayquaza
raikou
entei, raikou, suicune, lugia, ho-oh, and celebi(if you somehow manage to get a GS ball, which is almost impossible)
I think you cant get all three of them. If you choose Totodile as a starter-you can catch Raikou, Chikorita-Entei, Cyndaquil-Suicune
Raikou Doesn't Evolve
Moltres, Articuno, Zapdos, Raikou/Suicune/Entei (depends on what starter Pokemon you chose), Mewtwo and Unown (in the pokedex its considered rare).
The Rare Pokémon in Pokémon Silver who are Raikou, Entei, Suicune, Lugia and Ho-Oh can be found in various Johto locations, Raikou, Entei and Suicune can be found in any of the grass patches in Johto because they'll be roaming all around Johto, Lugia can be found in the Whirl Islands and Ho-Oh can be found in the Tin Tower.