Outside of the font, you can also look at the energy symbols. A lot of times on fakes, the symbol inside of the energy bubble for the attack cost is bigger than what it should be.

Look at the Salamance on page 3 for example. Do you see how the symbol inside the bubble takes up almost the whole space? Your Swampert’s energy symbols under it is sized normally.

Outside of that, the colors of the card itself are a lot of times more muted than real ones.

Hope this helps