emulators: added melonDS

wiki/games/emulators.md

@@ -18,6 +18,7 @@ Emulator games can even be
 
 - [Citra](/wiki/games/emulators/citra.md) emulates Nintendo 3DS games.
 - [Dolphin](/wiki/games/emulators/dolphin.md) emulates Nintendo GameCube and Wii games.
+- [melonDS](/wiki/games/emulators/melonds.md) emulates Nintendo DS games.
 - [mGBA](/wiki/games/emulators/mgba.md) emulates Nintendo Game Boy, Game Boy Color and Game Boy Advanced
   games.
 - [Nestopia](/wiki/games/emulators/nestopia.md) emulates Nintendo Entertainment System games.

wiki/games/emulators/melonds.md

@@ -0,0 +1,24 @@
+# melonDS
+
+[melonDS](https://melonds.kuribo64.net/) is a Nintendo Game Boy, Game Boy Color and Game Boy
+Advanced [emulator](/wiki/games/emulators.md).
+
+## Setup
+
+melonDS can be installed on different systems, a list for this can be found on
+the [melonDS website](https://melonds.kuribo64.net/downloads.php).
+Additionally it can be installed using [Flatpak](/wiki/linux/flatpak.md) where the
+package is called `net.kuribo64.melonDS`.
+
+## Usage
+
+The following sections describe specific issues relating to the configuration
+and usage of Dolphin.
+
+### Start Emulated Game in Fullscreen Mode
+
+In different scenarios it can be useful to start directly into a game in fullscreen mode.
+One example would be using the [Steam Deck](/wiki/games/steam_deck.md) to
+[set up a game in the Steam UI](/wiki/games/steam_deck.md#running-a-game-directly-through-the-interface)
+so it can be run directly without switching to the desktop mode.
+For this add the `-f` flag for fullscreen mode.