You unlock this door with the Key of Friendship...Beyond it is another Dimension...
My sincere thanks Lightning Bliss and Vectorbrony who provided artwork/editing:
https://www.youtube.com/user/e1d2k
https://www.youtube.com/channel/UC7b3r22TpF1-E2oJDzMNLSA
Audio editing provided by Jasper Pie: https://www.youtube.com/user/trainlover476
Additional artwork/editing provided by Xain, Lister of Smeg and Dillon:
http://xain-russell.deviantart.com/
http://lister-of-smeg.deviantart.com/
https://www.youtube.com/channel/UCWPB031o0VARFYiY4v7cqJQ

Also a big thanks to Silver Quill and Dusty Katt for Voicework:
https://www.youtube.com/user/tgcsilver
https://www.youtube.com/user/dustykatt

My Little Pony belongs to Hasbro.

Team Fortress 2 Music, Sound effects, and Characters belong to Valve.