-You refer to hospitals as pokemon centers.
-You keep throwing toy pokeballs at your pets/random animals wondering why they aren't being caught.
-You train your pets to fight other pets.
-You walk into a real gym and expect to see pokemon trainers and a leader
-When someone asks you what noise an animal makes, you call out it's name a few times (E.G "Sheep! Sheep!")
I'm guilty of the last one, I did it without thinking >.<