This document outlines the key stats that determine a Pokémon's battle performance: Attack and Special Attack boost the power of physical and special moves respectively, Defense and Special Defense improve resistance to physical and special attacks, Health Points determine durability, and Speed affects turn order. It also explains that Effort Values (EVs) determine final stats, with every 4 EVs granting 1 bonus stat point up to a maximum of 63 bonus points or 255 EVs per stat, and a total of 510 EVs overall.