I live in Baltimore, Maryland. In the actual city, there'd be lots of urban stuff like Meowth, Houndour, Scraggy, and Trubbish. If you were to go down to the harbor, you'd probably find more Water types like Wingull, Tentacool, and Qwilfish, and also a bit of Grimer because sadly it's not exactly the cleanest harbor in the world. Out in the suburbs and surrounding areas, you'd probably find lots of Grass and Bug types, pretty much any of the regional bugs, Ledyba, Spinarak, Hoppip, Roselia, Combee, Venipede, Foongus, and Volbeat and Illumise on summer nights, more Houndour and Meowth, Bunnelby, and the occasional Zorua. Surrounding the city, there's also lots of forests which would have Teddiursa, Deerling, and Stantler as well. And then if you were to go out towards the bay, you'd find a lot of water Pokemon like Tentacool, Wingull, Krabby, Sharpedo, Mantine, Clamperl, Horsea, Staryu, and Corsola.