How do you get by the guy who sells rage candy bars in heartgold?

You can't actually "get by" the guy who sells Rage Candy Bars in HeartGold. He's just a vendor, and his purpose is to sell you these items.

Here's how the situation works:

* He's a vendor: He's there to provide a service.

* He's not an obstacle: You can walk past him without any issue.

* He's optional: You don't have to buy anything from him.

If you want to avoid him, simply walk past him. If you need Rage Candy Bars, you can buy them from him. It's a simple encounter in the game.