Go north of goldenrod city and into the national park make sure its Tuesday, Thursday or Saturday if so you can talk to the guard and enter your Pokemon into the bug catching contest. If you win you get a sun stone, if 2nd place you get a everstone and if 3rd you get a gold berry. Runners up get a regular berry.
somewhere
There on Tusday and Wendsday.
Go to the national, and win the Bug catching contest. Only on certain days the bug catching contest will be there.
You get it in the Bug Catching Contest
Bug catching contest
Try catching a level 35 or above a level 32 is ok if there are no bug catchers
in the bug catching contest
Bug catching contest.
at the National Park
you get it in the bug catching contest
If the guard is behind the desk that's in the building before you enter into the National Park then that means the Bug-Catching Contest is not running that day.
In heart gold, you win the bug catching contest by catching the best bug type Pokemon. The score of the Pokemon you catch is based upon both it's stats and the amount of Hit Points it has left when you catch it.