There actually have been some very convincing fakes around of these, one thing i noticed is that on file 000 charmander’s flame is a lot closer to the edge of card than on my copy and the ones i found from google. The letter spacing also seems a tiny bit wider than on other copies but that might very well be perspective. Do you have card width and height to compare, not sure if there’s a lot of variance within different copies but that would at least tell if the flame is closer to the edge because of tighter cut or if the card layout is different
My card for comparison
Edit: the card actually looks a bit off centered so might be that too. Most likely authentic card but like said there have been very good fakes of these around.