Pokemon Heart Gold Version Cheats :
Code - Help Catching the 2 Legendary Dogs
If you have not already caught Entei and Raikou, this may help. You will also need Repels and pleanty of Ultra Balls;
1. Get a Dugtrio Lv. 39-Lv.43 that has Arena Trap
1.1 Get Dugtrio to the front of your party
2. Go to a random City and go back and forth from the city to a neighboring route
2.1 One will eventually come on the route
3. When you are on the same route, use a repel
4. While the repel is activated, run around in the grass or water
5. Soon you will run into Entei or Raikou
6. With Dugtrio's Arena Trap ability, the dog can not escape from battle. This is you time to attack! Get its HP down in the Red-Zone and keep on using Ultra balls. Soon you will catch it.
I think this may work with Latios/Latias. Hope I helped!
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