For example, I want the player to be able to create an arena, with some kind of named tool, and these arena regions can be saved into the config.yml file. Also, how do I check if a player is in this region?
HappyMelons You can use this as the core: http://forums.bukkit.org/threads/tutorial-make-a-minigame-plugin.168164/ Edit the code to fit your needs.