Questions about emulators

I have a few questions about emulators for NES, and GBC on the DS.
Which emulator is MADE for emulation of NES games on the DS?
I have virtuanes because I like it more on my computer but I wondered if it would work on my DS.
I downloaded NESticle but the speed was way to fast and I didn't know how to correct it.
Will a three in one work for your acekard?

 

Is that the only emulator? .. everywhere I look it's listed ad discontinued/obsolete and not suggested for anything faster than a 486.

why not try nester? http://www.telefragged.com/thefatal/index.php?content=inc_si_ds.htm

does your version have a config file?

 

I am going to try that when I get home.
Right now I am on a public computer.

 

I use nesDS. It runs every game I've tested perfectly except for super mario bros. SMB does run on it but the game speed is too fast.