Here is a hack for Front Line which changes all the characters into gun toting grenade lobbing foxes! Also the graphics have been changed and the palette changes give it a more livelier look to it than the dreary grey and dark green.
Front Line (Japan).nes - NOINTRO
CRC32: 44D123A4
MD5: AB4E56CD24F931F526A06C22DB43F1DF
SHA-1: 79C5F8D187B8FECC95CE5978F7BC7F6014341ECB
SHA-256: 2AA4EE9C586079402204431E858EFEF2A1529195C35867EC62D9D4A6D83C8889