Can Not Load DS Games, Need Help Please?

I havew downloaded several DS games and two are an english patched version of Pokemon Heart Gold and a normal Japsanese copy of the same game and the only game that works out of the five that I have downloaded (not counting the pokemon duo) is the Japanese version of the Pokemon game, all other games look like they are going to load but in the end they do not.What could I be doing wrong?

Best to let people know what card are you using to play them on ?

Ahh see, I am a newbie to downloading DS roms/emulators, I have only ever downloaded GBA and NES/SNES roms before so the DS emulator is completely new to me so I didn't know you needed a card (which now makes me wonder how the Japanese version of Pokemon Gold Heart could be played if I needed a card to play it on but im not going to go into technical stuff) so I guess the question now is where do I get said card from? What card would be the best?

A DSTTi, an Acecard 2i or something like that would be a good start.

The emualtor don't need a card, just the real nintendo ds, thats what i thought you ment at first sorryIf you are using the emulator then try runing games on no$gba 2.6a , but most emulators are not prefet[Tutorial] How to play DS games on No$gbahttps://www.romulation.org/forum/index.php?topic=31241.0Download the pakage it will have the english firmware.bin