April O\'Neil, Ariana Nussdorf, Julia Voth display their phones while playing the game in Los Angeles
People look at their cellphones while playing Pokemon Go at Pershing Square in Los Angeles
Brothers Jeffrey and Stephen Wang follow their cellphones while playing Pokemon Go in California
Eric Lee displays the game on his phone in San Gabriel, California where he and friends were playing
Kaylen Ray looks at his phone while playing Pokemon Go before a statue of Beethoven in Los Angeles
Customers visit a shop selling Pokemon goods in Tokyo, as Pokemon-mania sweeps the planet
Costumed performers dressed as Pikachu, a Pokemon series character, attend an event in Japan
Japanese videogame giant Nintendo\'s shift into mobile gaming has proved a massive hit