Board Thread:WARNING ALL USERS False Info\Spoilers/@comment-71.206.184.120-20140107041338/@comment-10759846-20140107195320

Its a Werecoyote as far was we know due to the synopsis for the next episode.

"Scott and Stiles  continue  to search for the  Werecoyote . Derek and Peter get help from an unlikely source."

http://teenwolf.wikia.com/wiki/More_Bad_Than_Good

However I think Scott & Stiles could be wrong about what it is but they haven't said or claimed to even know what it is yet.