Pokémon Crystal Tips

How to catch Entei and Raikou
Buy a second Gold/Silver/Crystal game and get the first 8 badges. When you get the Masterball, trade it into your main game by giving it to a pokemon to hold and trading that pokemon. Keep the masterball in your pack in your main game at all times. Then chuck it at entei or raikou when you happen to get a sighting of them. Get a 2nd Masterball and do the same thing for the 2nd dog, whichever that may be. Sure, it's a pain to get the 8 badges (you dont need 16) twice in a row, but it's much easier than trying to catch them using ultra balls and sleep powder.