Credit to DizzyEgg for this feature. This feature may also be directly pulled from DizzyEgg's [repel](https://github.com/DizzyEggg/pokeemerald/tree/repel) branch.

This tutorial will ask the player, upon a Repel running out, if they want to use another repel and also let the player choose which repel to use.

## Contents
1. [Modify multichoice menu to work with custom options](#1-modify-multichoice-menu-to-work-with-custom-options)
2. [Modify Repel script](#2-modify-repel-script)
## 1. Modify multichoice menu to work with custom options
The Repel menu will use the custom multichoice.

Edit [src/script_menu.c](../blob/master/src/script_menu.c)
```diff
-static void DrawMultichoiceMenu(u8 left, u8 top, u8 multichoiceId, u8 ignoreBPress, u8 cursorPos)
+static void DrawMultichoiceMenuCustom(u8 left, u8 top, u8 multichoiceId, u8 ignoreBPress, u8 cursorPos, const struct MenuAction *actions, int count)
 {
     int i;
     u8 windowId;
-    u8 count = gMultichoiceLists[multichoiceId].count;
-    const struct MenuAction *actions = gMultichoiceLists[multichoiceId].list;
     int width = 0;
     u8 newWidth;

     for (i = 0; i < count; i++)
     {
         width = display_text_and_get_width(actions[i].text, width);
     }
     newWidth = convert_pixel_width_to_tile_width(width);
     left = ScriptMenu_AdjustLeftCoordFromWidth(left, newWidth);
     windowId = CreateWindowFromRect(left, top, newWidth, count * 2);
     SetStandardWindowBorderStyle(windowId, 0);
     PrintMenuTable(windowId, count, actions);
     InitMenuInUpperLeftCornerPlaySoundWhenAPressed(windowId, count, cursorPos);
     schedule_bg_copy_tilemap_to_vram(0);
     InitMultichoiceCheckWrap(ignoreBPress, count, windowId, multichoiceId);
 }
```
Add the following new code:
```c
static void DrawMultichoiceMenu(u8 left, u8 top, u8 multichoiceId, u8 ignoreBPress, u8 cursorPos)
{
    DrawMultichoiceMenuCustom(left, top, multichoiceId, ignoreBPress, cursorPos, gMultichoiceLists[multichoiceId].list, gMultichoiceLists[multichoiceId].count);
}

void TryDrawRepelMenu(void)
{
    static const u16 repelItems[] = {ITEM_REPEL, ITEM_SUPER_REPEL, ITEM_MAX_REPEL};
    struct MenuAction menuItems[4] = {NULL};
    int i, count = 0;

    for (i = 0; i < ARRAY_COUNT(repelItems); i++)
    {
        if (CheckBagHasItem(repelItems[i], 1))
        {
            VarSet(VAR_0x8004 + count, repelItems[i]);
            menuItems[count].text = ItemId_GetName(repelItems[i]);
            count++;
        }
    }

    if (count > 1)
        DrawMultichoiceMenuCustom(0, 0, 0, FALSE, 0, menuItems, count);

    gSpecialVar_Result = (count > 1);
}

void HandleRepelMenuChoice(void)
{
    gSpecialVar_0x8004 = VarGet(VAR_0x8004 + gSpecialVar_Result); // Get item Id;
    VarSet(VAR_REPEL_STEP_COUNT, ItemId_GetHoldEffectParam(gSpecialVar_0x8004));
}
```
## 2. Modify Repel script
Replace the contents of [data/scripts/repel.inc](../blob/master/data/scripts/repel.inc):
```c
EventScript_RepelWoreOff:: @ 82A4B2A
	msgbox Text_RepelWoreOff, MSGBOX_SIGN
	checkitem ITEM_REPEL, 1
	compare VAR_RESULT, TRUE
	goto_if_eq EventScript_RepelWoreOff_AskAnother
	checkitem ITEM_SUPER_REPEL, 1
	compare VAR_RESULT, TRUE
	goto_if_eq EventScript_RepelWoreOff_AskAnother
	checkitem ITEM_MAX_REPEL, 1
	compare VAR_RESULT, FALSE
	goto_if_eq EventScript_RepelWoreOff_End
EventScript_RepelWoreOff_AskAnother:
	msgbox Text_RepelAskAnother, MSGBOX_YESNO
	closemessage
	compare VAR_RESULT, 0
	goto_if_eq EventScript_RepelWoreOff_End
	callnative TryDrawRepelMenu
	compare VAR_RESULT, FALSE
	goto_if_eq EventScript_RepelWoreOff_Chose
	waitstate
	compare VAR_RESULT, 127
	goto_if_eq EventScript_RepelWoreOff_End
EventScript_RepelWoreOff_Chose:
	callnative HandleRepelMenuChoice
	bufferitemname 1, VAR_0x8004
	removeitem VAR_0x8004, 1
	playse SE_TU_SAA
	msgbox gText_PlayerUsedVar2, MSGBOX_SIGN
EventScript_RepelWoreOff_End:
	end

Text_RepelWoreOff: @ 82A4B33
	.string "REPEL's effect wore off…$"
Text_RepelAskAnother:
	.string "Would you like to use another one?$"
```

And that's it!

![](https://i.imgur.com/XyhyJei.png)
![](https://i.imgur.com/xUFZfPh.png)
![](https://i.imgur.com/1KBYTJ7.png)