In an entirely new world packed with new baddies and bosses, can Mario still emerge successful in his journey in this all-new GBA ROM hack â Super Mario Land 4? Super Mario Land 4, known as Super Mario 4, is a ROM hack of the 1997 game Crayon Shin-Chan 4 for the Game Boy. The game is based on the concept and design of Crayon Shin-Chan 4, but this ROM hack features the classic gaming avatars from the original Super Mario games. The ROM hack introduces a new storyline, with changed and improved levels. The game is introducing new sets of power-ups that will help Mario in his adventures. The game's difficulty is a bit different from its predecessors since the game lets you start with a much harder difficulty. Will you be able to progress? Have fun!