Their card back is entirely different to the one found on standard Pokemon cards which are standardised to allow any card to be used when deck building (take a look at our Pokemon card back design guide for more details)
You'll see a collector number followed by a single letter: C, U, R, or M
Psychic and Lightning Energies, the most common, still feature in only one theme deck, but so does Fire Energy, one of the two rarest
20240525_16303119201950 292 KB 20240525_16312919202389 386 KB Also ive lately picked up few japanese reverse holos since the creativity and appeal of them has been excellent like with these 25th anniversary reverses, will pick up at least a shiny star v reverse at some point and hoping to see japanese reverses get more varying holo patterns in future too
Elite Trainer Box & Tin: Costco Bundle Pokemon Evolving Skies Keep track of your collection value over time
UR Ultra Rare Magical Hats X TRAP During your opponent's Battle Phase: Choose 2 Spells/Traps from your Deck and 1 monster in your Main Monster Zone