That sucks, but thank you.
I kept all my cards and was wondering if they would still be effective or even legal in the game today team rocket same predicament as abive
That said, the newer cards blow the older cards out of the water in terms of efficiency and power.
Sorry, but cards for that set are no longer legal. Every year pokemon rotates out certain sets of cards in order to change up the format. This year the legal sets are anything after Majestic Dawn. (Majestic Dawn, Legends Awakening, Stormfront, Platinum, Rising Rivals, Supreme Victors, Arceus, Heart Gold Soul Silver, Unleashed, Undaunted, Triumphant)