Merge or Delete Teams
You won't be able to merge or delete Teams in the user interface, but Streak Support can do that for you! Shoot us a note to firstname.lastname@example.org for assistance.
Boxes cannot be moved between Pipelines. One of the benefits of consolidating your Teams is to be able to move Boxes between Pipelines that were previously on different Teams.
Hint - You can share an individual Pipeline with a user who isn't a member of your Team in the Pipeline sharing settings.