Download retro roms to DS

This may be a stupid question but Im very new to this. Am I able to download retro Rom's to my R4DS? e.g Wonder Boy. Your help is appreciated!

Go to http://www.linfoxdomain.com/nintendo/ds/Click on the Emulators for DS section. That's a pretty good list of what's available to play on your DS.

Where do I find emulators - sorry Im very new to this

Check out http://nintendo-ds.dcemu.co.uk/ just make sure to patch the emulators to work with your card

There's a nice list of Emulators for DS in the NDS Trading Station. Check it out. Older emulators might need DLDI patching, which would be unlikely.