Creative Maze

I want to download some games for my R4 for the DS but every site I try is either asking for money or the games itself aren’t working when I put them on the R4. I’m looking for some free and reliable sites to download games. Please help! In particular i’m looking for the nintendogs, my sims and the legend of Zelda: Spirit Tracks games, but any other games will do as well as long as there free and working!

i know 2 sites for nintendo DS but here are they
torrentz.com
thepiratebay.com