As long as any Stadium card with Holon in its name is in play, each of your Pokémon that has δ on its card does 10 more damage to the Defending Pokémon (before applying Weakness and Resistance).
The Pokémon Company International is not responsible for the content of any linked website that is not operated by The Pokémon Company International. Please note that these websites' privacy policies and security practices may differ from the Pokémon Company International's standards.
Would you like to notify Pokemon.com administrators that you believe is an inappropriate screen name?
Your request could not be completed. Please try again. If the problem persists, please contact Customer Support.