Catch the water type Pokemon carried in a backpack is one of the Pokemon: Detective Pikachu and Pokemon GO crossover event challenges.

The Pokemon Company and Niantic Labs announced a crossover event between the live-action movie and hit augmented reality mobile game Tuesday. The event, centered around Pokemon featured in the movie, introduced a Shiny Aipom and movie-inspired Field Research challenges.

The water type Pokemon carried in a backpack is one of those challenges. Here's how to complete the Pokemon GO quest.

Trainers, our event celebrating the #DetectivePikachu movie is now live, and you’re the star!
✅ Challenge starring Pokémon in raids
✅ Encounter Pokémon from the movie more frequently in the wild
✅ Get photobombed by Pikachu in a detective hat

— Pokémon GO (@PokemonGoApp) May 7, 2019

Catch the Water Type Pokemon Carried in a Backpack

The Pokemon Detective Pikachu inspired Field Research challenge requires players to catch the water type Pokemon that's carried in a backpack.

For those wanting to figure out the challenge on their own, turn away now. The Pokemon required to complete this Field Research is Psyduck. The reward for completing it is a Magikarp encounter.

The Pokemon Detective Pikachu and Pokemon GO crossover event runs through May 17.

Photo courtesy of The Pokemon Company/Niantic Labs