So on April 1, 2014 Google had 150 random Pokemon out in the world. I finished catching them all at 1am EDT and the deadline was 5am for me (April 2, 2am PDT).
Apparently you can catch Mew at random locations once you got all 150. But after searching for 2 hours I couldn't find it and I had to get some sleep. Maybe one day I will find Mew.