The Pokémon GO Halloween event saw many players immersed into their smartphones. Between all the sweet bonus candy and ghost/ghoul type of Pokémon, it was no surprise over a billion Mon where caught.
1.3 billion to be specific, was the final count of the nine Halloween themed Pokemon to be caught during the five-day event. Niantic did unveil to online sources that the Mon "Gastly" was the most popular catch of the event, followed behind by Cubone and then Drowzee.
The 5 day Halloween spectacular could certainly be considered a success, especially surpassing a billion catches in such a short time.