The Japanese version of Metroid differs from the American version in four major ways:- It comes on a disk instead of a cartridge
- Thanks to the Famicom Disk System hardware, that music has instruments that don't show up in the cartridge version
- It uses a Zelda-style save screen instead of passwords
- The boxart is amazingly awesome
As for Star Luster, the Japanese version differs from its U.S. counterpart in just one way:
- It exists
- Metroid (Famicom Disk System, 1 player, 500 Wii Points)
- Star Luster (Famicom, 1-2 players, 500 Wii Points)
