‘The Hyundai Seoul’ pop-up Yu-Gi-Oh! store has a special promotion in which you receive rewards for completing missions. While in the OCG / Rush Duel sale zone you can collect stamps on a stamp card. For a limited time, while supplies last, your stamp card can be used to earn prizes including the following:

Exodia the Forbidden One
Dark Magician
Kuriboh
Black Luster Soldier
Buster Blader

Source.

As a note, Dark Magician and Buster Blader already had their chibi artworks released in Japan in a 7-Eleven collaboration, featuring a different background.