How do I merge my Rocket League progress and items between accounts?

When you link platforms to an Epic Games Account, you have access to all the items on those platforms. For example, when you link your Steam platform to your Epic Games Account you will have access to all items on both accounts. You will also have the progress level of your Primary account. For more info, check out: How do I link a console account to my Epic Games account?

The progress level from your Primary Platform is the one shared between all linked platforms. Your Challenges progression is also from your Primary Platform. To change your Primary Platform, check out: How Do I Change My Primary Platform for Rocket League?

Merging levels, challenges, or inventory from two accounts of the same platform is not possible. For example, you cannot merge PlayStation account A to PlayStation account B. Only one account from a platform can be linked to an epic account.