Miner Problem

Miner Problem is a zombie in Plants vs. Zombies: Battle for Neighborville. They only appear in Mount Steep, where they are trying to fill the mine with cheese.

The final boss of the area, Major Problem is created from a group of Miner Problems falling into the cheese.

Appearences
Miner Problems can naturally spawn in certain parts of Mount Steep. They also commonly appear in the quests of this area.

In Parmageddon!, the player and Dandelion discover they have been destroying the pipelines at the Cheese Pumping Station and plan to fill the mine with cheese.

In Treasure Hunt, a group of Miner Problems steal and rip up Exposition Al's map before they can give it to the player and they must be hunted down. These Miner Problems have more health than a normal Miner Problem, must be unearthed from their hiding place beforehand, and are invincible until their Robo-Zombie companions are defeated.

When the player reaches Rock Bottom, a single Miner Problem attempts to attack, before being shot down into the cheese, where several follow down with them and become the boss of the area.

Trivia

 * Their name is a pun off the phrase "minor problem".
 * This joke is continued with the boss being named Major Problem, a play off "major problem".
 * They might've been inspired by an unused Imp ability shown in the trailer for Plants vs. Zombies: Garden Warfare 2, which featured a flying machine that wasn't in the actual game.