Document PSS functions

include/item_menu.h

@@ -60,5 +60,6 @@ void CB2_BagMenuFromStartMenu(void);
 u8 sub_81ABB2C(u8 pocketId);
 bool8 UseRegisteredKeyItemOnField(void);
 void CB2_GoToSellMenu(void);
+void GoToBagMenu(u8 bagMenuType, u8 pocketId, void ( *postExitMenuMainCallback2)());
 
 #endif //GUARD_item_menu_H