You can get others, but not until you get the national dex.
ask a friend
catching trainers Pokemon
Tuesday, Thursday and Saturday.
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.
Scyther and Pinsir are the best that you can find in the bug catching contest. Well i don't know if you can find a heracross or not...... sorry if i mistype the pokemon's name
You get it from catching or thieving it from Pikachu. (Has a 5% chance of holding it.)
You can obtain Keckleon by catching it on your Pokewalker in Treehouse and sending it back to Heart Gold.
Yes you can by using action replay to catch your rivals starter Pokemon with the code for catching trainers Pokemon
You need the National poke'dex
Growlithe can Evolve only with use of a fire stone. Fire stones can be won at the bug catching contests.
You trade it to Pokemon platinum after catching it in Pokemon Soul Silver or in Heart Gold. In Cerlun City in Kanto. (after beating Lance the champion).
you will need gba games of Pokemon old version and get six Pokemon to migrate it in the pal park