The same place you find him in gold, north of Goldenrod City. You have to beat Whitney and then get the Squirtbottle from the house behind the gym. Use it on Sudowoodo and he will attack you.
After you beat the Goldenrod City gym, you need to get a watering can from the building next door. Use this on Sudowoodo and you will be able to battle it.
sudowoodo
No you will need Emerald or Pokemon Colosseum to trade you a Sudowoodo.
You must learn rock smash. You get that from a man standing in the right of you you when you have beaten sudowoodo
sudowoodo
Sudowoodo does not evolve in Heart Gold. It evolves from Bonsly.
One word:ANYWHERE.
Go to the Key Items pocket in your bag, press "Use" and you will be able to use it. For doing on the Sudowoodo blocking your way to Ecruteak City, just press "A" when your close enough to the Sudowoodo.
It's Darkrai. You can't get him in Heart Gold.
Pokemon Heart gold is different from Pokemon Gold cuz heart gold has better graphics new Pokemon and new events
The same place you find him in gold, north of Goldenrod City. You have to beat Whitney and then get the Squirtbottle from the house behind the gym. Use it on Sudowoodo and he will attack you.
After you beat the Goldenrod City gym, you need to get a watering can from the building next door. Use this on Sudowoodo and you will be able to battle it.
sudowoodo
it is where if you leave to go to the next town it is blocking the road or out of the park to the east
No you will need Emerald or Pokemon Colosseum to trade you a Sudowoodo.
get the watering can thing and spray sudowoodo... after beating the gym.