Foil cards in Pokemon TCG feature a thin layer of metallic foil applied to specific parts of the card, usually the artwork, text, or borders. When light hits the foil, it reflects and produces a shiny or iridescent effect, giving the card a distinctive appearance. The foil can come in various colors and patterns, adding depth and visual interest to the card design.
Foil cards are typically considered more valuable and desirable compared to non-foil cards, especially if they feature popular or sought-after Pokemon or contain valuable game-related abilities. They are often included in booster packs, special sets, or collector's editions of the Pokemon Trading Card Game.
Foil cards are highly sought after by collectors due to their unique aesthetic appeal and potential rarity, making them a valuable addition to any Pokemon card collection.