How they appeared in the game is that Oswald somehow "forgot" to get rid of the fireworks in Wasteland, much to Ortensia's disgust when they are first revealed to the player at the end of Dark Beauty Castle.
Fireworks appear as a basket of small explosives and one rocket explosive. To set them off, Oswald needs to shock them with electricity. When he does, the tiny explosives start to shoot off into the air and then the big rocket soars up and explodes violently, dealing massive damage around them.
- There are a bigger variations of fireworks near the end of the Floatyard that are so big that they cannot be moved.