We cannot find any Nintendo DS games on iTunes app store, but if you want to play DS games on iPad or iPhone, you can try Nintendo DS emulator called nds4ios that let users play the games on both jailbroken and non-jailbroken devices.
Nds4ios emulator allows users to play Nintendo DS roms directly on their iPad and iPhone, that works with iOS devices running iOS 5.1.1 and above. The emulator also includes features such as Dropbox integration and iOS 7 controller support.
How To Install Nds4ios On Jailbroken Device
Open cydia and select “Source”, then tap on “Edit” > “Add”, type “http://cydia.angelxwind.net/”.
Search for “nds4ios”. You will see “nds4ios (Stable)” and “nds4ios (Testing)” two version, select stable version to install.
Don’t run the app after installed. Tap on “Settings” app and go to “General” > “Date & Time” > Set Automatically change to off mode by tap on the ON/OFF toggle, change the date to February 8th, 2014.
You can revert back to the current date and time after run the app.
How To Install Nds4ios On Non-Jailbroken Device
Open Safari web browser and visit this link. Scroll down the web page till you see below picture.
Tap on “Install nds4ios (stable) via OTA” start to download.
Same as above change the date to February 8th, 2014 and then revert back to the current date and time after run the app.
How To Play
Tap on + button to open Coolrom website and download Nintendo DS games.
Now select “Open in nds4ios” after download completed and start to play Nittendo game.
PS :Due to this emulator has been taken down few months back complained by Nintendo, the developer already hosting this emulator app to other site. Follow below tutorial install on your iOS devices.