Ndash.eu is a library containing hundreds of roms for Nintendo DS and Gameboy Advance.
You will just have to scroll down the site and you will be able to download the ones you find more interesting.
Some of the Nintendo games you will find are the Fifa World Cup, action loop, advance wars, age of empires, animal crossing and many others.
And for the Gameboy you will find games such as crash bandicoot, megaman, super ghouls and ghosts, puyo pop fever, donkey kong country, crazy taxi and many others.
As you can see, here you will find all types of games for the entire family, from the little ones to the grandmother and grandfather.
To download any of these games you will have to click on the link and follow the instructions the site will give you, then you will be able to play it with no problems.
