Whats the mushroom symbol on some of my pokemon cards?

on some of my pokemon cards there is a little mushroom symbol like the top of a gloom in the bottom right hand corner of the PICTURE NOT THE WHOLE CARD BUT THE PICTURE.





can some one please tell me what it means





cheers

Whats the mushroom symbol on some of my pokemon cards?
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Reply:You could try the sites listed below. The second link is better...


Good luck