I (mis)read this in wikipedia a long time ago:
"Metroid II's designer, Nintendo R&D1, was also involved in developing the Game Boy Color, a device similar to the Game Boy but with a color screen. Nintendo's Dan Owsen acknowledged in an interview that the company planned to release a color version of Metroid II. He believed that Nintendo R&D1 included a special "Metroid palette" in the Game Boy Color's hardware, which "makes Metroid II look really, really nice on Game Boy Color", and remarked that the release should have graphics comparable to the original Metroid on the Nintendo Entertainment System. However, the project was eventually canceled."
I misread it totally. I thought it said that they made GBC's software play M2 in color, so there was no need to release a DX version.
"Metroid II's designer, Nintendo R&D1, was also involved in developing the Game Boy Color, a device similar to the Game Boy but with a color screen. Nintendo's Dan Owsen acknowledged in an interview that the company planned to release a color version of Metroid II. He believed that Nintendo R&D1 included a special "Metroid palette" in the Game Boy Color's hardware, which "makes Metroid II look really, really nice on Game Boy Color", and remarked that the release should have graphics comparable to the original Metroid on the Nintendo Entertainment System. However, the project was eventually canceled."
I misread it totally. I thought it said that they made GBC's software play M2 in color, so there was no need to release a DX version.