Importing Badges into other courses

Create a backup with all activities, badges and user data of the course which contains the badges you want to import. Restore the course backup to a new course, restoring the users as manual accounts. Delete the enrolled users. You can use the participants bulk action "Delete selected user enrolments". Reset the activities which will contained user data from the previous course (quiz attempts, forum posts, feedback responses...)   After doing it, the badges will exist in the restored course, disabled but with images, criteria and 0 recipients. With the previous steps, the uniqueness is not preserved because the badges are restored using the same names on the original course. However, if you need to change some information (such as the issuer), you'll need to change also the badge name (at least for now).