The game contains three unused graphics:
• An image of an NES controller. It can be found amongst the ending cutscene data.
• A bomb with no associated sprite data. A similar object appears in Chip 'n Dale Rescue Rangers.
• A sprite of Scrooge wagging his tail while ducking.
Contributed by MeleeWaluigi
There's a sprite of Scrooge wagging his tail while ducking, but the reason for removing it is unknown. However, his tail might wag while bouncing on his cane.
Contributed by ProtoSnake
The Transylvania theme was completely different in the game's prototype, and the moon theme was originally 20% slower than in the final version.
Contributed by game4brains
In a prototype version of the game, the health restoring item was a cheeseburger instead of ice cream.
Contributed by RadSpyro
It is possible to finish the game with $0. Upon doing so, you get a special ending where the newspaper reads:

"Scrooge McDuck has lost his fortune in his search for the legendary five treasures. He will use them to rebuild his empire."
Contributed by Pogue-Mahone