List of TCG cards with hidden attacks
In the Pokémon Trading Card Game, there are several cards in the Expedition Base Set, Aquapolis, and Skyridge expansions that can use extra abilities in a duel when the card is scanned through the e-Reader. The ability will often be an attack (which may require Energy like a normal attack), but it can also be a Poké-Power or a Poké-Body.
Cards with e-Reader enabled abilities
Expedition Base Set
Aquapolis
Skyridge