So when I sent them a message asking if I could make a fan game...

"We applaud your efforts at game development and encourage you to become a developer if he hasn't already done so. Please understand, however, that you do not have our permission to develop software using Nintendo trademarks—even if you have become a licensed Nintendo developer. Games featuring Nintendo trademarks are usually developed internally or by business partners. Please focus your efforts on creating your own intellectual property as you develop your software."

Well, guys, I guess it's official. If you release a custom quest it can't have any Nintendo trademarks or other owned stuff in it. Because as Bible says "Render unto Caesar's what is Caesar's, and render unto God what is God's".