@nintendoboy96 said in Ms Pac-Man/Galaga:

Where do I get the full rom? I also want to mention that I am using mame2003.

Please read carefully the forum rules again - no asking for ROMs here.

I have been several different websites and I keep getting the file name 20pacgal.zip.

Yes, that's correct.

I also want to mention that I am using mame2003.

Make sure you have the right ROMset collection for Mame2003, it's all explained in the documentation page that @Ashpool posted.