With the exception of "Monster World IV", each game in "Wonder Boy" series has been ported to other systems by Hudson Soft. The original game was ported to the Nintendo Entertainment System under the name "Adventure Island", which eventually spawned its own franchise. "Wonder Boy in Monster Land", "Wonder Boy III: The Dragon's Trap", and "Wonder Boy in Monster World", were all released on the TurboGrafx-16/PC Engine under the names "Bikkuriman World", "Dragon's Curse", and "The Dynastic Hero" respectively. "Wonder Boy III: Monster Lair" was ported to the TurboGrafx-CD with original main and boss characters, although the North American version removed the "Wonder Boy III" part in the title while the Japanese version kept it. Another port of "Wonder Boy in Monster Land", titled "Saiyūki World", was developed by NMK and published by Jaleco for the Nintendo Famicom in Japan, also spawning an independently created sequel, "Saiyūki World 2", which was released in North America as "Whomp 'Em".