it's not available in diamond, pearl, or platinum so the only way to get it is to trade it from an older game.
In sapphire you cant catch it without events or cheats:-)
four without cheats Articuno Zapdos Moltres Mewtwo plus one of the legendary dogs; entei, suicune or raikou
Moltres, Zapdos, Articuno, Raikou/Suicune/Entei.
no!! of cours yo can not catch raikou in ruby raikou can only be cought in the johto region
without cheats,you need to receive the oak's letter in the Nintendo event
You cannot catch shaymin on platinum without cheats unless u get the event xcard from toys r us
You catch raikou in vermilion city in the smallest patch of grass
you dont
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.
after you catch a glimpse of entei, raikou, and suicune at the burned tower in ecruteak city, you can track entei and raikou using your map.
Only by trading with someone else or transferring it in from a Gen IV game.
You can't catch Arceus without cheats.. You can get it when an event is going on about Arceus..