Source:
https://www.reddit.com/r/PS4/comments/nrygek/im_a_big_fan_of_editors_and_goldeneye_007_so_i/
You find these levels by going to the Arcade mode > "Solo & Coop" > search function and search for PSN username "Perfect-Dark1982"
Nintendo is selling their IPs to Microsoft and this is true because:
http://gamrconnect.vgchartz.com/thread.php?id=221391&page=1