Ball Cactus

Ball Cactus (仙人球; pinyin: xiānrénqiú) is a plant in Plants vs. Zombies: All Stars. It is the downgrade of the Cactus. It was originally supposed to appear in Plants vs. Zombies, but it was cut from the game. It attacks zombies by lobbing cactus balls at them. It can be unlocked by collecting 30 Ball Cactus puzzle pieces.

Plant Food upgrade
Perception weakness: Shoots spike balls to an enemy which has the lowest health. Deals double the damage if the enemy is at 30% or lower health. It requires Brave Plant Food to be activated.

Trivia

 * Ball Cactus, Cactus, Cactus (from Plants vs. Zombies: Garden Warfare) and all his variants, Homing Thistle and Tree Cactus are the only plants in the series based on cacti.