Attach Strength Charm to 1 of your Pokémon that doesn't have a Pokémon Tool attached to it.
Whenever an attack from the Pokémon that Strength Charm is attached to does damage (after applying Weakness and Resistance), the attack does 10 more damage. At the end of your turn in which this happens, discard Strength Charm.

Strength Charm
Expedition Base Set 150 · Trainer · Pokémon Tool
StandardNot legal
Regulation marknone
RarityUncommon
Standard uses regulation marks H and later, plus identical reprints of legal cards.
Released September 15, 2002.
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Build with this card
The Pokémon deck builder checks every deck against the Standard rules, and Genny can build one around Strength Charm.
Open the deck builder