Best unused graphics and features of games.

[Koopaul]

How about the interesting history of Diddy Kong Pilot.

It had four different versions!

2000 build including Mario characters!
http://www.youtube.com/watch?v=-DRAqj__5eA

Then there was the build from 2001 which had and explorable overworld.
http://www.youtube.com/watch?v=OEE1si5bxEM

Then the build from 2003 replaced a lot of characters but included dogfights.
http://www.youtube.com/watch?v=sg7SYh1lWqQ