Bugs:Disney's Donald Duck: Goin' Quackers (Windows)
This page details bugs of Disney's Donald Duck: Goin' Quackers (Windows).
Nephew Skip
If you stand behind the nephew but turn away from him to a certain angle while standing on the level portal, you can enter the level without talking to the nephew or needing any of the toys. This happens because the nephew's hit box is supposed to prevent you from entering, but it doesn't cover the portal completely.
This can be seen in the video at 20:18
This is also possible in the Nintendo 64 port.
Getting Behind The Chase Head
In Chase Level Head Alley it is possible to get behind the rolling head before the first checkpoint. To do this, you have to walk onto the fragile bridges at the right moment and jump over the head.
This even allows to show an otherwise unused idle animation, which can be seen at 17:39 in the video
The bug can be seen at 16:38 in the video