Cabbage: A game that was in development on the N.64 that was about taking care of alien things like pets. You could walk,feed,and train them. Cabbage,Super Mario 128 and Earth were all put together to become 1 game known as Pikmin.
EarthBound 64: EarthBound 64 was a game in development for the N.64 but was canned and turned into the Japanese exclusive game Mother 3.
Metroid 64: Metroid 64 was in a long development period for the N.64 until it was canned because Nintendo had trouble turning Metroid 3.D. Nintendo found out how to do this with the Metroid Prime games.
Project H.A.M.M.E.R: A game in development for the Wii since 2006 but was said to be canned but nobody knows for sure what happened to the game and it could even still be in development.
Kirby New Adventure: A Kirby game that was similer to Kirby 64 and was canned on the Gamecube but is said to still be in development on the Wii almost every year but its still not here.
Stage Debut: Stage Debut was a game developed for the Gamecube in 2004 that was about being characters such as Animal Crossing boy, Olimar. Mario and even Mr. Miyamoto and Iwata. The characters danced on stage and just had fun. This game was never "canceled" but was an insperation for the Mii characters on the Wii according to Miyamoto the game still exists in his mind.
I vote for Stage Debut!
