Has gotten a lot better This emulator has come a long way. When I first tried using it two years ago  it is nearly impossible to play Pokemon. Now  the game can be run with a slight lag on my S5. The app crashes at times  but the autosave feature is a huge saving grace  especially for Pokemon. If the app is really acting up  restart your phone and it should crash less frequently. I don't expect much from a DS emulator for my phone  so I am satisfied by this app. I wouldn't have played these games if it wasn't for the app.
June 12 2016