While Zynga has fallen, and mobile game maker King was acquired by Activision Blizzard, one start-up has quietly built a new kind of mobile game business.
20 years after Nintendo launched its phenomenally successful Pokemon games, the group has yet to transition its famous gaming stars onto our smartphone screens.
Harriet Taylor is a CNBC.com technology reporter based in San Francisco. She covers Apple, Uber and the sharing economy, cyber security and emerging Silicon Valley trends.