An unused level can be found in the game files, intended to be the fourth level for New Quack City. The level is fully playable, but is largely untextured. An unused item known internally as the Gold Nugget can be also be found on the level.
From the raised portion of the railroad tracks in Lower East Quack, the player can glide outside the normal level boundaries. There is a large, open area, much of which has collision detection added, as well as a stray brown bear that cannot be seen during normal gameplay. There are also two moving taxis here which can be ridden on. There is no opportunity to do this during normal gameplay as all taxis are static once reached normally.
Inside the game's data are two unused models for the cow enemy: one for the Beaver Power hubworld, and one that would have appeared in Viggo-A-Gogo.
In Dinos Downstairs, there is a box of cereal called 'Mice Crispies', a reference to 'Rice Crispies'.
In Dinos Upstairs, the boys bedroom has a poster for a film named 'Planet of the Bears' with the quote "Take your hands off me, you damn dirty bear!" This is a reference to the film Planet of the Apes.
If a player pauses at the correct time during a Fluffmatch, they will be given the chance to 'Return to Hubworld'. Doing so allows two players to play on single player mode. This is also the only way to play as The Mighty Flea outside of the fluffmatches and flea levels.
There is a poster of General Viggo in the nursery of Dinos Upstairs. The image will change if it is stared at for around 20 seconds.
Underneath the boy's bed in Dinos Upstairs is a magazine lying on the floor called 'Playbahariasaurus', a reference to Playboy.
There is a cheat only accessible through a cheat device known as 'Glyn and Nick'. Once activated, the voices in the game are replaced by a low quality recording from Nick Wiswell and Glyn Williams from the former Bizarre Creations team.
Shooting all of the rabbits in Fur Fighter Village will unlock a cheat. The cheat, titled 'Blood', will not work even when activated unless it is used on a PAL copy of the game. According to a former Bizarre Creations employee, it was removed from US versions of the game due to censorship issues.