Google is sending out a prize to those that captured all 151 Pokémon on Google Maps: Pokémon Challenge
. Those that commented on the Google Map #PokemonChallenge thread
and indicated where they found the 150th (or 151st) Pokémon by 12am on April 21st, 2014 are eligible for the surprise gift. Google sent messages to users that completed the Dex with a link to register for the gift. The surprise gift should begin arriving to players by the end of May 2014.