@droripory A majority of Mysterious Pearls (like 99% of them) were given away at the Winter Challenge 2007 events . These ones were not distributed with shields as they weren’t given to top-placing players.
The ones with the shield were given to top finishers at Battle Road 2007 Spring. They have the name, tournament venue, and placing of the winner on the nameplate:
Only 81 copies were distributed like this, meaning there are only 81 “real” shields for Mysterious Pearl.
We made Vhett shields so that collectors could display their cards in a similar way to the original trophies even if the card was graded. To make sure that they weren’t passed off as the originals we included the “replica” text on the nameplate for this very reason, so I’m glad it worked 
They’re also UV-resistant to protect the card from sun-fading which can happen with the original shields.