What zombie drives a vehicle that leaves a trail of ice?

The zombie that drives a vehicle leaving a trail of ice is the Zomboni.

Zomboni is a distinctive vehicle-based zombie in the original Plants vs. Zombies. It drives across a lane in a machine resembling a Zamboni ice-resurfacing vehicle, leaving a frozen strip behind it. The ice can damage or remove plants in its path and creates a surface that enables the Zombie Bobsled Team to slide across the lawn.

This makes Zomboni more than a high-health target: its vehicle changes the battlefield. Players can destroy it with strong explosive attacks, direct damage, or plants suited to handling armored threats. Once the machine is gone, the ice trail remains an important concern until it is cleared or otherwise dealt with.

Zomboni is commonly confused with Catapult Zombie because both are vehicle-associated special zombies. Their roles are different: Catapult Zombie launches basketballs at plants, while Zomboni reshapes the lane with ice. Dr. Zomboss is a boss character, not the ice-driving zombie.