Piplup with a manaphy symbol?

Hi everyone, i'm very new to the pokemon cards and me and my friend are just looking at some of her old cards and we found this?

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Sorry bout the shaky hand

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https://preview.redd.it/ol74byvii8591.png?width=3024&format=png&auto=webp&s=584e4872267a92eab8b1675a4d9f78571afc9e8f

I dont know if its a mistake or something to do with a release? Some form of promotion. Very confused