On Sunday, thousands of "Pokémon GO" players gathered at Chicago's iconic "Bean" statue in Millennium Park.
And then they sang the Pokémon theme song in unison:
27,000 people said they were "interested" in attending the meet-up on Facebook, and around 4,000 showed up. It might be the largest organized meet-up of "Pokémon GO" players yet.
"What a wonderful turn out!" wrote the meet-up's co-organizer, Ryan Harvey, on Facebook. "We estimate somewhere in the neighborhood of 4,000 trainers made it out!"
In case you want to hear the rest, here's the full theme song from the original Pokémon anime TV show:
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