http://www.fileformat.info/info/unicode/char/1f409/index.htm
Also, since any ASCII dragon is also a valid Unicode dragon (in UTF-8, at least), the following might satisfy your needs:
http://www.dougsartgallery.com/ascii-art-dragon.html
To see this dragon, either:
1. Use Safari or Firefox on OS X. 2. Install custom fonts for Linux or Windows. 3. Install https://chrome.google.com/webstore/detail/chromoji-emoji-for... for Chrome
Also: didn't know that for every emoji there is https://en.wikipedia.org/wiki/🐉
http://www.fileformat.info/info/unicode/char/1f409/index.htm
Also, since any ASCII dragon is also a valid Unicode dragon (in UTF-8, at least), the following might satisfy your needs:
http://www.dougsartgallery.com/ascii-art-dragon.html