Collecting Pocket monsters cards

Naatje2003

Aspiring Trainer
Member
Hey! I recently discovered old pocket monsters cards in my attic. Each one has a different evolution chain on both sides, 1 of which is holo. There is also a number in the upper right corner each time, like 1211 for example. I have absolutely no idea of the value and I can't find anything about it on the internet either. Can anyone help me?
 
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