For a complete answer: visit gamefaqs and search for Pokemon Gold & Silver (or whatever version you are playing on)
if you must know:
you have to encounter Raiku first (I don't know where he is)
it is a very tedious process that involves looking in your pokedex
you have to look for Raiku and look at location-the pokedex will tell you where Raiku is but he constantly moves
The direction he travels is random, just keep pursuing Raiku until you corner him. Don't use fly (he'll completely change location and be further away if you do that).
None of the legendary dogs will be added to your pokedex until you see them for the first time. Work on filling up your pokedex and you will see them eventually.
They are right below suicune aren't they? nope..
You don't use it to find Entai, you have to find Entai in order to get it in your pokedex.
you cant find raiku in Pokemon pearl just Pokemon gold
You will only find Raikou if you chose Squirtle as your starter pokemon. After you receive the National Pokedex from Oak, Raikou will begin to roam Kanto. the other way is to have a friend trade you one.
Raikou roams around Johto. The best thing you can do is walk all around the Johto region, until you find it. If you fail to catch it because it runs away. You can go into your Pokedex and track where it's at from there. A recommended way to catch it, is to use Mean Look on it, that way it can't run away.
Raiku Kemppi's birth name is Raiku Jaanukka Pennanen.
you have to find barboach or use an action replay
Here is a battle of Raiku and Onix. Raiku uses shockwave on Onix, paralyzing it. Then Raiku uses thunderbolt on Onix causing little damage on it. Raiku uses thunderstrike on Onix, causing little damage. Onix uses earthquake, killing Raiku.
You don't find a pokedex, generally the professor gives it to you.
well it says unknown area somehow you have to find it if you dont catch it check on the pokedex and whereever the map is covered red that is where it shall be there it moves a lot
its roaming around aimlessly through johto. once you see it you can find out where it is via your pokedex but if you use fly it'll go somewhere completely different. it is the same with entei. when ever you find it, it will run away after one turn. it will not hurt you. you can only hurt it. get it down to red health with weak attacks, the put it to sleep or paralyze it. the best poke balls to use are ultra balls, fast balls, and ObVIOUSLY master balls.