I tried:
Super Mario 64DS
New Super Mario Bros
Mario Kart DS
Mario Party DS
Sonic Colors
Zelda Phantom Hourglass
Crash Of The Titans
Nintendo DSi Browser
Mario Clock
Mario Calculator
Flipnote Studios
Real Soccer 2009
Rayman Raving Rabbids
Mario Craft
Sega SuperStar Tennis
Kirby Canvas Curse
Kirby SuperStar Ultra
Super Scribblenauts
I have a old 3DS 11.4U
Try only with Mario Kart DS
Put console output ON and test. If still white screen, update bootstrap pressing X and later Y on settings, and set bootstrap to "Release", later set it to "Unofficial", then set it back to "Release".