Cleanup and create menews_jisan header

include/event_data.h

@@ -51,4 +51,6 @@ extern u16 gSpecialVar_MonBoxId;
 extern u16 gSpecialVar_MonBoxPos;
 extern u16 gSpecialVar_0x8014;
 
+extern u16 gUnknown_20370D0;
+
 #endif // GUARD_EVENT_DATA_H

include/gba/defines.h

@@ -69,5 +69,6 @@
 #define WIN_RANGE(a, b) (((a) << 8) | (b))
 
 #define NAKED __attribute__((naked))
+#define UNUSED __attribute__((unused))
 
 #endif // GUARD_GBA_DEFINES

include/menews_jisan.h

@@ -0,0 +1,8 @@
+#ifndef GUARD_MENEWS_JISAN_H
+#define GUARD_MENEWS_JISAN_H
+
+void sub_8146C30(u32 a0);
+void sub_8146C88(void);
+void sub_8146CA4(void);
+
+#endif //GUARD_MENEWS_JISAN_H