From Bulbapedia, the community-driven Pokémon encyclopedia.
The Rock Wall Deck is a type deck found in the Gym Heroes Strategy Guide. The deck is classified as one of the advanced decks, containing more rare cards and strategy than other easy-to-build decks.
With this deck you want to make Onix or Chansey your Active Pokémon as soon as possible. These two Pokémon have a lot of Hit Points and make great walls. While Onix and Chansey stall your opponent, work on evolving Brock's Geodude into Brock's Golem. Use Pokémon Trader and Pokemon Breeder to help you find the Pokémon you need.
When you've got Brock's Golem ready, use Switch to make it your Active Pokémon (or move it up when Onix or Chansey get Knocked Out). Then you can use Brock's Golem's Rock Slide and Crush attacks to smash through your opponent's Pokémon.
Since this is a mostly Fighting deck, you have to worry about Pokémon with Resistance to Fighting. If you run into a deck with a lot of Pokémon with Resistance to Fighting, use Pewter City Gym and Brock's Geodude to stop Resistance from working.
- Even though Brock's Onix Lv. 30 is listed, an image of the other Brock's Onix card, which is Lv. 41, is shown to the side.