Funky Wireless Protocols Trophy in Marvel's Spider-Man 2

There are 42 Spider-Bots, small robot spiders hidden around the city, and either hero can pick them up. The first comes with the story right after main quest 12, Science Buddy. They are never marked on the map: look for a pink pulse and listen for their sound, and they show on the minimap when close. The map counts how many each district has left. Once all 42 are found, the mission The Message appears in Financial District. Finish it for the trophy.