Authentic 1st edition base Charizard, Blastoise and Venusaur?

[NREICH3]

Hi guys and gals,

I recently purchased a 1st edition base PSA 9 Charizard off Ebay but with the help of a friend I was able to identify the seller was a fraud and the card did not exist (he was advertising an unlimited PSA 9 Base Charizard but had photo shopped a 1st edition Charizard over it).

Luckily I did not fall for the scam but due to this scare I did some research and learnt more about 1st edition frauds such as fake stamping and so on. My problem now is that I am worried that my PSA Base Charizard, Blastoise and Venusaur may not be authenticate, is it possible for people to fake a PSA graded Pokemon card?

Photos of the photo shopped Charizard:
https://i.imgur.com/movRYIR.jpg
https://i.imgur.com/sfApkC0.jpg

Images of my Charizard:
https://i.imgur.com/svPFwzs.jpg
https://i.imgur.com/gR3ABfm.jpg

Images of my Blastoise:
https://i.imgur.com/Vcjsesj.jpg
https://i.imgur.com/u8iZE7l.jpg

Images of my Venusaur:
https://i.imgur.com/55SPlLY.jpg
https://i.imgur.com/yXby6TZ.jpg

Please let me know if you cannot access or view the images above.

Any help will be greatly appreciated,m any thanks in advance!