In some game modes, players can use randomly appearing items to help them damage or KO their opponent. Some of these items include bombs, peaches, baseball bats, assist trophies (which temporarily produces an AI character that attacks opponents), and Smash Balls (which allows the player to unleash a powerful Final Smash attack). Players can choose stages to play on. Most of the stages are based on places in other Nintendo games, such as "Mario", "Donkey Kong", "The Legend of Zelda" and "EarthBound", but others (such as the Final Destination stage) are from "Super Smash Bros." In later games, player also have the choice to choose out of 3 different stage versions for every stage. These include the default stage, an Omega version (which turns off items, removes obstacles and makes the stage perfectly flat, so that the stage mimics the Final Destination stage) and a Battlefield version (which turns off items, makes the stage perfectly flat but adds three static platforms above it, so that the stage mimics the Battlefield stage). This feature has been added due to the popularity of using no items on a relatively empty stage in competitive tournaments of the games.