He's ready to line up the would-be outlaws and shoot them down, just like he always does
However, opinions are split on its utility
Magnezone deck Recommended: Fighting (Fighting needed for the battle task) Silvally deck Recommended: Fighting (Fighting needed for the battle task) Umbreon deck Recommended: Grass (Grass needed for the battle task) Meoscarada deck Recommended: Fire (Fire needed for the battle task) Lucario deck Recommended: Psychic (Psychic needed for the battle task) Giratina deck Recommended: Darkness (Darkness needed for the battle task) Greninja deck Recommended: Lightning (Lightning needed for the battle task) Excadrill deck Recommended: Fire (Fire needed for the battle task) Heatran deck Recommended: Water (Water needed for the battle task) If you were to complete all Deluxe Pack ex Step-Up Battle (Intermediate) battles, you would earn 27 pack hourglasses, 900 shinedust, 450 EXP, and 117 shop tickets

Here's the Sandshrew card pictured for reference: (source: studiobebop.net) I could have sworn these cards once had resistance to lightning, and a simple Google image search confirms this (in addition to revealing the cards getting HP boosts, among other changes)
There are plenty of ways to improve your collection, with some requiring you have a little money to spare, and others requiring that you just have a few friends who are also looking to trade