None out of 6 roms work... Help Please?

So, I just downloaded 6 roms, none of them work.
Touch Detective worked for a while, but then some of the animation were just black blobs. I also downloaded Pokemon Mystery Dungeon Explorers of Time, it just played a weird animation in the beginning and then stopped working. The only one that worked so far is Phoenix Ace Attourney, which has all kinds of weird lines across the screen, and it's not from this site. The World Ends With You also doesn't work, but I've seen so many threads about that I'm not sure what to say... LOL.
I'm not exactly sure what is wrong with it. I'm using them on the computer using the DeSmuME emulator. Should I just try downloading other DS emulators? >_______<;;
Any help would be very appreciated. C:

Edit:
It's a DS emulator.

 

use no$gba iam pretty sure all your games listed will work on it

 

Isn't that a GBA emulator? Does it work with DS games? O:

 

Don't use DeSMume it sucks. Use no$gba or iDeaS. no$gba is a GBA AND NDS emulator. It was just a GBA emulator to start with, but he didn't change it to no$nds when it could emulate NDS. Don't let the name fool you.

 

Thank you, I agree, DeSmuME sucks.
But I can't get no$gba to work with them either.

 

You need to go Options, Emulator Setup then under NDS Backup Cartridge Media etc. you need to change the save type to get games working. The World Ends With You doesn't currently work with any emulator.

 

WOW! Thanks so much! <3
It finally works!
-huggles-
Merci.