what is the huge zombie in pvz called

In the game "Plants vs. Zombies," the large, towering zombie you are referring to is known as the "Gargantuar." This zombie is significantly larger and more challenging to defeat than the standard zombies, requiring more substantial efforts and effective strategy from the player.

The Gargantuar has a high health level, can crush plants with its massive size, and throws smaller zombies called "Imps" onto your lawn, making it a formidable opponent. Players need to use strong plants or particular combinations of plants to stop its progress and protect their garden.