melonDualDS has been around for a while (the first release, 0.0.1, was released back in June of last year) and is described as a Nintendo DS and DSi emulator for Android, built on top of melonDS and the melonDS Android port by rafaelvcaetano. Developed by Sapphire Rhodonite, it was recently updated to version 0.7.0 over the weekend, introducing major changes you should know about if you're interested in the DS emulation space.