Brock makes a rare appearance in the Pokemon TCG, as he doesn't boast many valuable full art cards to collect, but still ...

Pokémon TCG Pocket has a number of missions you can ... Mewtwo packs have Giovanni and Koga, while Pikachu packs have Misty, Brock, and Lt. Surge. Charizard packs have Erika, Sabrina, and Blaine.