Cabbage

Cabbage is a cancelled N64 64DD game by Nintendo. It was going to be a animal breeder game.

Gameplay
Announced in 1997 for the 64DD, it was an interesting project. Players would breed creatures in the game; the internal clock would keep track of time. Players could then transfer the creature to GameBoy when not home to take care of it.

Cancellation
The game has a victim of circumstance. The 64DD was a flop and the regular N64 wouldn't have allowed the gameplay mechanics to work. Elements of Cabbage were later used in Animal Crossing games and Nintendogs.