all secret rare cards – Don Games Secret card (TCG) - Bulbapedia,

While there isnt any information on the effectiveness of Leungs side deck, from an outside view they all seem to be relevant responses to the meta of Beatdown and Hand Control that he faced at the time

Since battle destruction is a condition, if you actively use it, you will set up a self-binding attack

Black Border Foil with Barcode and Holofoil Stamp / Black Border Filler Card from English Eldritch Moon Rare/Mythic Melt and Double Faced cards Foil uncut sheet front

The second place card goes to another Eeveelution, Epseon Gold Star #16

Trading card games can't be returned in order to maintain inventory integrity