They will have a special visual effect to them, with The Pokémon Company saying they "sparkle beautifully," but will otherwise be identical in function to their non-Shiny counterparts.

More like this Pokemon TCG Pocket ... For Pokémon TCG Pocket, the Shiny Pokémon cards will sparkle when tilted, adding to the effect. Fans of the Shiny look can also get a Shiny Charizard ...