Super Mario Maker: Use Items Not Unlocked!

In Super Mario Maker, a player must complete the Super Mario Challenge to unlock all items. However, there is a way to use items that are not yet unlocked.

First, clear both challenges on a course that has items you want in your own course. Then, edit and NEW SAVE that course. Don't worry, because the default course can't be deleted.

Delete everything on the course except for items that you do not have and want to use. Sometimes, you can enter copy mode, and copy items you do not have. Next, create a course using unowned items! I used this method to make a course with keys and locked doors.