- If I intend to use a Poke-POWER [or Ability], do I have to announce its name or can I just take the action specified?
- You have to clearly communicate your intent to use a Poke-POWER [or Ability] by some method other than just performing its game effect. Show or tell your opponent which Pokémon is going to use what Power.
Source:
PUI Rules Team (2008-11-13)