The Hong Kong Module

Cartridge which is said to contain all Virtual Boy games, plus some demos, protos, and by hackers selfproduced games;
Manufacturer: Unknown pirate company
There is next to no information about this illegal Virtual Boy cartridge, but there has been said the following about this cart in the past few years:

Taken from an article in N64 Magazine's Retro corner: "There has recently been news of a multi-cart for the system. Apparently, the Hong Kong souced cartridge contains all 21 official games and some additional demos and prototypes. Don't get too excited though, the cartridge has yet to be seen for sale outside the territory."
*please note that this article was written 2 to 3 years ago (at present it's the year2000), which explains why the article doesn't say "22 official games", seeing as not much was known about the Japanese VB games at the time;

Also said is: "The multi-cart was a rumour from friends in Japan. Apparently it was amazingly expensive, costing around £400 equivalent. It had versions of Mario Kart and G Zero on it, but these were pirate versions, made by illegal coders. Still nice to have though."
And by someone else: "A guy I know in HK who I buy *cough* PSX silvers *cough* from was at one point selling HK modules. Although he cant remember for sure the exact contents he was quite sure it had 3 mario games on, one being mario kart. I assume the other two were Clash and Tennis (or Wario Land). You switched games by turning the VB on and off (like old pre-menu Gameboy multi carts)."

AND:

"I have several contacts in Indonesia and Korea, where the VB multis aren't unheard of, it's just that there are so few machines out there, that the big piracy guys don't bother much with the machine."