File Extension NGP File Format NeoGeo Pocket ROM Image NGP stands for NeoGeo Pocket ROM Image. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question rom is volatile or non volatile How to get rid of geo-fencing Where is ROM located on a computer?