Please see this site on Planet Nibiru. And please keep in mind that if you don't have a PhD in astrophysics you don't have the right to give an opinion on the existence of this planet, even if it isn't there.
From the site:
Is Nibiru real? Does it take Nibiru 3,600 years to complete one orbital journey? As you can imagine, the gravitational effects of a sizable planet moving close to the inner solar system would spell big trouble for planet Earth. Earth has been acting up lately with an increase in earthquakes, volcanoes, global warming (oops..I meant “climate change”), blending of seasons, and more. Open your mind a little and stop believing everything our so called scientists and NASA folks have to say. Every week NASA seems to have learned something new that was unthinkable.
So there. Let us heed this wise counsel. We should all open our minds a little and stop believing everything our so called scientists and NASA folks have to say!