Project Atlantis

Project Atlantis was a prototype handheld console that was supposed to be a new iteration of the Game Boy console line. The development of the handheld started around 1995 and was scrapped around 1996. The handheld was scrapped due to the poor performance of it, it being too bulky, and the cost of manufacturing it being too expensive.

The Project Atlantis handheld supposedly had a 32-bit RISC processor, a 3-by-2-inch colored LCD screen, and a link port attached to it, which was similar to that of the released Game Boy Advance. This is no coincidence, as Project Atlantis is considered to be a predecessor to the handheld.

Since Project Atlantis had a link port attached to it, it can be assumed that it was meant to be connected with the Nintendo 64, as both consoles were developed around the same time. This is also like the Game Boy Advance, which would connect to the Nintendo Gamecube.

Mario's Castle
See Mario's Castle Mario's Castle was a rumored cancelled video game meant for Project Atlantis, developed around the same time frame as the handheld. It would demonstrate the linking capabilities of Project Atlantis with the Nintendo 64 (then known as the Ultra 64) via the latter's video game Super Mario 64, based on the handheld having a link port and that the game was going to be the premier title of it.

It has been rumored that the Personalisation A.I. in Super Mario 64 had seeped it's way into Mario's Castle cartridges via the link port, causing unintended side effects of the game to occur. This was also rumored to be one of the reasons why Mario's Castle got shelved.

Trivia

 * Project Atlantis' name is based of the lost city of Atlantis, which was a rumored underwater city in the public eye. This could be connected to the handheld's rarity and it being scrapped.