Zombie Bobsled Team

The Zombie Bobsled Team only appears where a Zomboni has left an ice trail. They will push a bobsled onto the lawn, and once it is completely on the screen, they will jump in. While in the bobsled, they are very fast and usually cannot be stopped. The bobsled will disappear when the end goes off the ice, after which the zombies will walk forward normally.

Strategy
The Zombie Bobsled Team fortunately only appears where a Zomboni has left a trail of ice. The bobsled is low toughness, although it is hard to destroy before it disappears. Potato Mines are handy against these zombies, as a Potato Mine at the end of the ice trail will destroy both the bobsled and its occupants. Peashooters don't work well with them, so use AoE plants such as Fume-shroom or Spikeweed instead. Jalapenos can melt the ice that the bobsled team arrives on, as well as destoying the bobsled and its occupants.

Bobsled Bonanza Mini-game
At the beginning of the level, use Potato Mines and other instant kills to defend against these zombies. Replace these with Spikeweeds, as three will be able to kill the zombies once the bobsled disappears. It is not necessary to upgrade these to Spikerocks, although it has minimal effect the zombies do die faster, while the main reason to upgrade being the Zombonis.

Trivia

 * For some reason, the Zombie Bobsled Team does not ever appear in Survival: Endless.
 * The bobsled says "Brains or Bust" on its side and has a picture of a brain in the front.
 * The Zombie Bobsled Team is never shown on the plant-choosing screen. The only exception to this is the Bobsled Bonanza Mini-game.
 * When seen during the plant-choosing screen for Bobsled Bonanza, the zombies are shown frozen in their bobsled, which seems to mean that they don't have a standing animation in their bobsled and weren't meant to be seen in it.