Raikou will appear if you chose squirtle as your starter and after delivering the ruby and sapphire to celio. You can find it on every route in kanto making it very difficult to capture i personally found it easy to find on route 7 and route 1.
Raikou is only found in firered and leafgreen if you chose squirtle as your starter Pokemon. Or you can get the purified raikou from Pokemon colosseum.
You can't find them in there.
LeafGreen version does not have Growlithe.
If you chose Bulbasaur or Charmander as your starter pokemon, then Raikou can't be found in the wild. If you chose Squirtle, however, Raikou can randomly be found in the wild (excluding Sevii Islands.)
the place where raikou is most likely to be found is route 1.
You can't find a Vulpix in Pokemon FireRed version. That pokemon is version-exclusive to Pokemon LeafGreen.
You can find them anywhere around the routes of kanto so look in the grass.
Raikou can be found anywhere where grass is the best route would have to be route 1.
you have to get lucky and find it there is no certain place were it will first be at
You must trade it from Pokemon firered or Pokemon leafgreen
You must trade from LeafGreen version.
you cannot find a bulbasuar ,you can migrate from the leafgreen version