What does a fake Yugioh card look like?

Authentic cards will have a shiny, square stamp on the bottom right corner of the front of the card with the words “Yu-Gi-Oh!” in small, horizontal script. Fake cards may be missing the foil stamp or the letters may be arranged vertically. The color of the foil should be either gold or silver.

How much is a misprint Yugioh card worth?

If someone has a Lightpulsar Dragon with the name shifted down and he valued the normal card at $4, I would offer $5-$6. If the name was much lower, like over the image, I may go as high as $10. It's highly dependent on the severity of the misprint. A slight misalignment of something would only get a few more dollars.

Can you use fake cards Yugioh tournament?

Counterfeit card used in tournament? I mean it's possible. However most players can tell if a card is fake at a glance. But if you only planned on using it in a tournament, it would be cheaper to get a play set of Dragonic Diagram.