Fake pokemon cards

[Merdrill]

Can someone help? I just got a pokemon card from a friend but I cant tell if it's real or fake. It's a Japanese Koga's Pidgey. It is smaller than an original Japanese pokemon but I'm still not sure.

 

[pikakitten]

Here is a link to all Pidgey cards, if it's not there it's fake.
https://www.serebii.net/card/dex/016.shtml

 

[Oryx]

Posting a picture might help. Anyway kicking this to the proper section.

 

[donavannj]

Well, how much smaller is it than the other Japanese card? A picture of the difference in size as well as of the card itself would help in identifying whether it's a fake or not.