I've created a bunch of nice SNES MK2 codes. They can all be found at gscentral.org
Anything by the user darthtsung, I created. You can feel free to use those. Also you should try to find the large list by Orlando C Fernando.
Here's just a couple of mine:
MK2 SNES GG
Liu Kang Can Recovers From Low Fire Really Quick
Can rethrow to stop first one. Good for quick juggles. Throw Low then do another special for power combos. Can lead to infinites.
Mileena's Telekick, Roll Combo (My Code, plus one of OCF's broken codes make his code work)
to make Mileena even MORE powerful...
Mileena's Roll Is Superfast