Basketball

Basketballs are projectiles, lobbed by the Catapult Zombies. These balls do the damage of one bite, so six balls can eliminate a plant. The basketball's only weakness is the Umbrella Leaf, as it deflects the basketballs away from the plants.

Strategies
Fore more strategy, see Catapult Zombie.

The best way to deal with basketballs, or really, Catapult Zombies, is to place a Spikeweed or Spikerock in the first or second column near the Zombies. Any Catapult Zombies that appear will explode instantly.

If a Catapult Zombie's vehicle is not destroyed by a Spikeweed or Spikerock, then you could use an Umbrella Leaf to counter the basketballs and prevent them from harming your plants in the back.

If you want, you can also place a Wall-nut or Tall-nut in the back row of the column the Catapult Zombie is in. This will stall him (until he runs out of basketballs) and you can get a lot of damage on him.