After you've made sure that your battling Neopet is healthy, fed, and equipped with at least one weapon, either select a one-player challenger, sign up for a Skirmish, or Send a Challenge to an opponent. Once a match has been made, your Neopet will meet their opponent in the Battledome. There, the goal is to reduce your foe to 0 Hit Points (or HP) before they have done the same to you. To attack the other battler and bring their HP down, select two weapons from your Battledome equipment and then press the Fight button. The first one to wipe out their opponent's HP wins! For a more thorough explanation of how the Battledome works, check out the Battledome tutorial.