There's no specific spot to catch raikou because raikou is a wondering Pokemon it can go from route to route in kanto and this makes it hard to catch but all more worthwhile to catch it.
You cannot catch Raikou in Pokemon Diamond and Pearl. To get Raikou in Pokemon Diamond and Pearl, you must trade for one from Pokemon HeartGold and SoulSilver where it can be caught or transferring from Pokemon FireRed and LeafGreen.
You cannot catch the legendary dogs in Diamond or Pearl, you must migrate from Pokemon LeafGreen, FireRed, Colosseum, or XD.
Trade from FireRed or LeafGreen.
Trade it over from FireRed or LeafGreen. If you had the starter as: # Bulbasaur: You will be able to catch Entei # Charmander: You will be able to catch Suicune # Squirtle: You will be able to catch Raikou
Entei, Raikou, and Suicune are NOT obtainable in Pokemon Platinum.You will either need to catch them in Firered/Leafgreen and migrate them or trade with someone else that has them.
You can not catch it in leafgreen,but in firered you can.
You catch raikou in vermilion city in the smallest patch of grass
no cause you are a stupid
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You have to have leafgreen or firered trade you entei and raikou.
Get another from leafgreen or another firered or get one from Pokemon colosseum.
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.