Scene 1 - Ryme City
The trailer's opening seconds feature more Pokémon than any other scene as we're introduced to Ryme City, a location lifted straight from the "Detective Pikachu" game. While several of the flying Pokémon can't be clearly identified, I counted at least 8 monsters in this scene alone.
Emolga, the sky squirrel Pokémon, can be seen flying here, and again later in the Ryme City marketplace.
Charmander, one of the three starter Pokémon from the first game, passes by on the lower left, and later uses his tail to help light a fire in the marketplace.
Later, we see Psyduck and Lucy (Kathryn Newton) on the street — with more guest stars in the background.
Pikachu has always been the mascot of Pokémon, but Detective Pikachu is a new character introduced in 2016. He debuted in a Nintendo 3DS game of the same name.
The trailer also shows us the Ryme City Marketplace.
In addition to Emolga and Dodrio popping up in the background with Pikachu, there's one more visable Pokémon in the crowd.
Charizard is one of the series' most iconic Pokémon, appearing on the box and cartridge of "Pokémon Red."
The trailer shows a group of Greninja chasing Pikachu and Tim through multiple scenes. The ninja frogs first debuted in "Pokémon X and Y," in 2013. Fun fact: Greninja's "scarf" is actually his tongue.
Three Pokémon inside the cage with Tim and Pikachu can easily be missed in this dark scene, including Squirtle and Panchan, who are both shown on missing-persons (or missing-Pokémon) posters earlier in the trailer. Panchan is standing at the bottom of the cage as the camera fades in.
Squirtle, the last of the three starter Pokémon from the original games, can be seen behind bars on the right side of the screen.
Mr. Mime is one of the original 151 Pokémon — and certainly one of the weirdest.
The "Detective Pikachu" trailer is stuffed full of Pokémon with just two minutes of runtime, and much of what we see in the background of Ryme City suggests that we'll be seeing many, many more when the film releases next year. With more than 800 different species of Pokémon to chose from, Warner Bros. has plenty of options.