From what I have read they have not found it they just think it could be there. Considering all of the people who have declared their being another large body out there "impossible" if it is found the persons deriding and insulting others because they themselves declared it "impossible" should up and apologize!!
I read one article that within both said this object was found and that it was being looked for, that is how messy this information has become.
QuoteAs they studied the freaky way that these objects lined up in space, Brown says, they realized that "the only way to get these objects to line up in one direction is to have a massive planet lined up in the other direction."
What's more, this planet naturally explains why the dwarf planets Sedna and Biden have weird orbits that never let them come in close to the solar system. "This wasn't something we were setting out to explain," says Brown. "This is something that just popped out of the theory."
http://www.npr.org/sections/thetwo-way/2016/01/20/463087037/hints-of-a-hidden-distant-planet-in-our-solar-system
However i like it, it fits the last Pope the last President and many prophecies :)
The 1926 Barack Obama prophecy
http://weblog.liberatormagazine.com/2008/05/1926-barack-obama-prophecy.html
Baba Vanga prophesied even that the 44th US president would be black and he would be "the last one."
http://prophecies-2012.blogspot.com/2011/02/baba-vanga-prophesied-44th-us-president.html
The "Prophecy of the Popes" is attributed to St. Malachy, an Irish archbishop who was canonized a saint in 1190, according to Discovery News. In his predication, dated 1139, Malachy prophesied that there would be 112 more popes before Judgment Day. Benedict is supposedly the 111th pope.
http://www.huffingtonpost.com/2013/02/14/st-malachy-last-pope-prophecy-theologians-prediction-_n_2679662.html