Bugs:DuckTales (NES)
This page details bugs of DuckTales (NES).
Endless Boss Fight
After defeating the Yeti in the Himalayas, if you pogo-jump into the snow and touch the treasure at the same time, the level will not end properly. The end-of-level music jingle will play and you'll collect $1,000,000, but the timer will continue to tick down and you'll be stuck in the boss room with nowhere to go. The only way out is to either reset the game or wait for the timer to run out. Note that doing the latter will allow you to fight the Yeti and collect the treasure again, which essentially means you can convert each of your remaining lives into $1,000,000 if your timing is good enough.
Boulder Garbage Glitch
There are two known instances in the game where hitting a boulder (i.e. a block which can be wacked into the air) will generate a garbage entity. Should these entities hit another boulder, they will disappear; as such, this bug is easier to observe if one gets rid of the neighboring blocks, though this is not necessary (but then it's only visible for a single frame).
In both cases, the entity will turn into a white circle once a ceiling or floor is hit.
- In the Amazon, get to the secret passage to the boss and hit the center block of the bottom row. Note that in this case leaving the topmost block will cause the garbage entity to bounce against it.
- In the African Mines, go down to the section with water. Just before the first pit is a pile of boulders. Hit the second one from the left on the bottom row, and another grotesque glob of garbage will go gliding gleefully.
The reason for this glitch is that the boulder is in fact a different map object with separate data. Whatever the glitched object was meant to be is unknown.