ˌʌndɚ ðə bˈæɾəl zˈoʊn sˈɪstəm, plˈeɪɚz kʊd kɹiːˈeɪt "ɹˈuːmz" fɔːɹ bˈæɾəlz, biː ɪɾ ɐɡˈɛnst mˈɔnstɚz ɔːɹ ˈʌðɚ plˈeɪɚz.
Under the Battle Zone System, players could create "rooms" for battles, be it against monsters or other players.