Ookouchi Gengorou Ikka is a cancelled simulation game for the Nintendo 64. The game was not ever officially announced and it's existence is only known through a prototype build that was shown off by Game Tanteidan, a retro game store based in Nihonbashi, Osaka, on their blog.
Pixel Tank is a really simple game. It's a pixelated fish tank! Use it to relax or as ambiance in the background of your work day or even while you sleep! Every minute in game you gain a coin. You can use those coins to unlock any fish you want in the game. It's like Pixelated ASMR!
A virtual pet game where you must raise one of three puppies, likely released amidst the Nintendogs craze. A Chinese-language version was released as a Nanjing cartridge, which contains a battery to save progress; an English version was included on several plug & plays, but it cannot save progress.