The Danger Cart is a dark green trailer with planks of wood on the top with the words "danger cart" messily written across them in red paint. The cart is pulled by Meatwad while Master Shake and Frylock ride in the back. It used to be used much more in the show around the time of its debut and earlier episodes, but gradually became less and less used.
Danger Cart
While the Danger Cart is most commonly seen with red paint, there are a few variations. During the pilot episode 'Rabbot', "danger cart" is written across the side with neon green paint.
The original design of the Danger Cart in the pilot episode.
Another variation includes the launch of Aqua Unit Patrol Squad 1, in which rather than "danger cart" being written along the side of the cart, "aqua unit patrol squad" is written on the side with purple paint. If you look closely, you can still see the faded red paint.
The Danger Cart as seen in the pilot episode to Aqua Unit Patrol Squad 1.