Ancient Pompeii

Ancient Pompeii is the second world in Plants VS. Zombies 3: Battles Through History. After The Greek Islands has been completed, the player unlocks the Key of Fire, which unlocks a portal to Ancient Pompeii. Ancient Pompeii has 35 levels, and there are five new plants, as well as a returning plant: Lava Guava, (Pepper-mint) Explosive Vines, (Bombard-mint) Purple Sunflower, (Enlighten-mint) Firey Pear (Bombard-mint) Smokey Chards (Contain-mint) and Ash Stalks (Enlighten-mint).

Gimmicks
The main gimmick in the world is the Slider Rows, which can wash in zombies and burn down any plants that are on the Slider Row that aren't Winter-mint plants. The Slider Rows introduce five new types of zombies.

On Level One, the Burning Zombie is introduced. Burning Zombies randomly burn one plant adjacent to them, but they move stiffly.

On Level Ten, the Lava Cone Zombie is introduced. Lava Cone Zombies are somewhat like Pompeii Cone Zombies, but lava spews out of their cones and affects all plants adjacent to them. Winter-mints will be killed instantly, and Pepper-mints won't be harmed at all.

On Level Twenty, the Lava Barrel Zombie is introduced. Lava Barrel Zombies wash in on Slider Rows and push their barrels onto regular rows, and when the barrels are destroyed the row turns into a Slider Row.

On Level Twenty-five, the Magical Fire Summoner Zombie is introduced. Fire Summoners create fire and throw it at any sun producing plants, leaving a charred square that can't be planted on for three minutes.

On Level Thirty, the Smokey Lion Tamer Zombies are introduced. Smokey Lion Tamer Zombies ride in on Smokey Lions, giving them lots of extra health. They can come in basic, conehead, lava conehead, or bucket variants.

Level Thirty-five, the boss battle with the Crispy Lava Zombot, has four Slider Rows and one of each of these zombies wash in on the every four minutes, as well as sometimes being spawned by Zomboss.