Easy rare dogs
The easy way to get Raikou, Entei, and Suicune is to capture or raise a pokemon to learn the move "meanlook" hunt down which ever rare dog you want, have the pokemon that knows "meanlook" in the front of the party. When you find the rare dog of your choice you need to use "meanlook" so then it can't flee. Bring lots of ultra balls or simply a master ball.