This guide is intended for users who want to play Pokémon Mystery Dungeon Rescue Team DX ROM hacks made by the community.
You can either play ROM hacks on a homebrew-enabled Switch or with the Yuzu emulator.
Table of contents
Follow these steps if you want to play ROM hacks on real hardware.
<aside> ⚠️ Custom Firmware is considered safe and, in most cases, cannot cause persistent damages to the system if you have backups. However, we are not responsible for any damages or bans that might occur! Text guides are strongly recommended since videos about this subject are often outdated.
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First, you need to setup the custom Firmware Atmosphère on your Switch console. Please follow this guide, which explains all the terminology and walks you through the process step by step: https://nh-server.github.io/switch-guide/
<aside> ❗ Rescue Team DX has online features, so be sure to also follow the guide on how to block communication with Nintendo's servers. An emuMMC setup is also recommended. If blocking the servers entirely is not an option for you, avoid using in-game features like online rescues which need an Internet connection. Some ROM hacks might include features that connect to the internet, so keeping your Switch disconnected e.g. with Flight Mode is not recommended or required, since blocking Nintendo's servers is enough to avoid bans.
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Note that many ROM hacks require the game version 1.0.2. You can check by pressing the + button in the Switch main menu while Rescue Team DX is selected. If you have an older version, it might be necessary to update the game in the + button menu under Software Update - Via the Internet.
After you're set up. shut down your Switch and insert the SD card into your computer. You should have a folder called atmosphere on your SD card. If you download a mod/ROM hack, the archive should also contain an atmosphere folder.
Next, copy the atmosphere folder of the ROM hack you've downloaded and paste it into the root (outer) folder of the SD card. A dialogue box should show up, asking you if you want to merge the folders. Depending on your operating system, select "Yes" or "Merge".
If the resulting folder structure on your SD card looks like this, you're good to go:
Safely eject the SD card and insert it back into your Switch console. You are now ready to start the game. If present, refer to the readme file of the ROM hack for more information.
If you switch to another ROM hack, delete the folder "atmosphere/contents/01003D200BAA2000" and the folder "atmosphere/exefs_patches/hyperbeam_patch_102" on the SD card before copying the atmosphere folder.