If you want a safer experience, download the standard ROM from a verified site like Vimm's Lair (search "Vimm's Lair NDS"). If the game is not in Spanish, search separately for a "Spanish Patch" (IPS or UPS patch file) and apply it yourself using a patching tool. This is safer and ensures you get a clean, uncorrupted game.
Mario Kart DS y New Super Mario Bros. son esenciales por su jugabilidad, mientras que Brain Training del Dr. Kawashima popularizó el uso de la pantalla táctil en español. nds roms en español
This is the weakest aspect of the site.