https://blog.faceutil.com/2020/07/09/gba-%eb%a9%94%ed%83%88-%ec%8a%ac%eb%9f%ac%ea%b7%b8-%ec%96%b4%eb%93%9c%eb%b0%b4%ec%8a%a4-metal-slug-advance-%e3%83%a1%e3%82%bf%e3%83%ab%e3%82%b9%e3%83%a9%e3%83%83%e3%82%b0-%e3%82%a2%e3%83%89/