You might have noticed that one of my goals for the 1.0 release is to get DSi mode in melonDS up to par with DS mode.
If you're running into trouble: Howto/FAQ (WIP) Wifi: local multiplayer, online connectivity.Various display position/sizing/rotation modes.Nearly complete core (CPU, video, audio.While it is still a work in progress, it has a pretty solid set of features: MelonDS aims at providing fast and accurate Nintendo DS emulation.