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.
To find raikou you need to go to the burned tower their yu would find all three dogs and you will have to search for them exept suicine
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.)
if it uses roar you can't find it again so save your game when your looking for him
You don't need to use a Repel, but it makes it easier to find if your Pokemon is higher than the other wild Pokemon, but lower than Raikou.
When you come across broken Big Booker Bridge with Raikou, you will get for partner Blue Eyes.Then you come across Daybreak Ruins, you will find Summer and Red Eyes, they will broke the monument of Entei,but before they broke it, you will register the sign of Entei.
Emerald
You can't find raikou in ruby.
You go to a mountain and catch raikou
Yes in the johto region and in Pokemon emearld also Pokemon xd gale of darkness can get one.
you dont find raikou in dimond
yes
Raikou does not appear in Pokémon Pearl, you'll have to trade it from someone who has one.
In the wild.
It is wherever it ****ing wants to be
it is found at the South America.
To find raikou you need to go to the burned tower their yu would find all three dogs and you will have to search for them exept suicine
After you beat the elite 4 again raikou starts roaming again.