Little confused with some things:

On the whole i can get DS roms to run fine: super mario bro's, my sims and even zelda all work fine. However some games like wario master of disquise, marvel trading card game and the new chibi robo game i just cant get to work. i've tried re-downloading them over and over but to no avail. wonderd if there was something wrong with these specific ones or im doing something wrong. any help would be mucho appreciated!

Replying to #1

Well, that depends...how are you playing them? If you're using a flash card, then you should keep in mind that they have different compatibilities with different games.

Are you using an emulator? R4? M3? or other? it really helps to state what your using.

In emulator NO$ press F11 and configure NDS Backup Media, by default there is none and hardly any games work with this setting.