kartdlphax is an exploit for the Download Play mode of Mario Kart 7. It can be used with universal-otherapp to install custom firmware on target devices.
In order to follow these instructions, you will need the following:
- A second 3DS with custom firmware (the **source 3DS**) that is the same region as the 3DS you are trying to modify (the **target 3DS**)
- A physical or digital copy of Mario Kart 7 that is the same region as both consoles
- An SD card for both devices
### 必備項目
On the **source 3DS** (the 3DS with custom firmware):
* The latest release of [kartdlphax](https://github.com/mariohackandglitch/kartdlphax/releases/latest)
* The latest release of [Luma3DS 3GX Loader Edition](https://github.com/Nanquitas/Luma3DS/releases/tag/v10.2.1)
On the **target 3DS** (the 3DS that you are trying to modify):
1. Copy kartdlphax's `plugin.3gx` to the following directory on the **source 3DS**'s SD card, depending on the **region of your copy of Mario Kart 7**:
- USA: `luma/plugins/0004000000030800`
- EUR: `luma/plugins/0004000000030700`
- JPN: `luma/plugins/0004000000030600`
- Create the `plugins` and `00040000...` folders if they do not already exist
1. Eject the SD card and put it in the **source 3DS**
#### Section II - Prep Work (target 3DS)
1. Insert the SD card of your **target 3DS** in your computer
1. Copy `boot.firm` and `boot.3dsx` from the standard Luma3DS `.zip` to the root of your SD card
1. Eject the SD card and put it in the **target 3DS**
#### Section III - kartdlphax
1. Power on the **source 3DS**
- If you are prompted to set up Luma3DS, just press START to save the configuration
1. Once in the home menu, press (Left Shoulder) + (Down D-Pad) + (Select) to bring up the Rosalina menu
1. Select "Enable plugin loader"
1. 按『B』退出 Rosalina 選單
1. Launch Mario Kart 7
- Ensure that wireless connectivity is enabled
- kartdlphax should tell you that it is running
1. Navigate to `Local Multiplayer` -> `Create Group`
1. Power on the **target 3DS**
- Ensure that wireless connectivity is enabled
1. On the **target 3DS**, open the Download Play application (![]({{ "/images/download-play-icon.png" | absolute_url }}){: height="24px" width="24px"}), then select "Nintendo 3DS"
1. Join the group created by the **source 3DS**
1. Select "Start" on the **source 3DS** once it has detected the **target 3DS**
1. Once multiplayer has loaded, navigate to `Grand Prix` -> `50cc` -> (any driver) -> `Mushroom Cup`
1. Wait a while (a percentage should be displayed on the **source 3DS**)
1. If the exploit was successful, the **target 3DS** will have booted into SafeB9SInstaller
#### Section IV - SafeB9SInstaller
1. 等待所有的項目檢查完畢
1. 出現提示時，輸入上方螢幕所顯示的按鍵組合以安裝 boot9strap
1. 過程結束後，按下『A』重啟主機
#### 第五節 — 設定 Luma3DS
1. Your target 3DS should have rebooted into the Luma3DS configuration menu
1. 透過方向鍵及『A』以開啟下列選項：
- **"Show NAND or user string in System Settings"**
At this point, your console will boot to Luma3DS by default as long as the SD card is inserted.
+ Luma3DS does not look any different from the normal HOME menu. If your console has booted into the HOME menu, it is running custom firmware.
+ On the next page, you will copy Luma3DS to internal memory so that you can boot without an SD card.
+ You will **not** need to use your **source 3DS** to complete any further steps on this guide.
