Shell on Wheels

Difficulty: Very easy

Shell on Wheels is an achievement in Plants vs. Zombies 2. It requires the player to place a Wall-nut on a minecart. It is worth 5 points in the Game Center and 500 XP on Google Play Games for Android devices.

Strategies
Having a Wall-nut in a minecart not only unlocks Shell on Wheels, but it also has high practicality. Having it there allows the player to share a Wall-nut across multiple lanes. This is especially helpful combined with Wall-nut First Aid and Plant Food when the Wall-nut has low health. It also serves as a buffer for the other plants.

Trivia

 * Shell on Wheels is a reference to the television series Hell on Wheels.
 * Playing Wild West's Save Our Seeds levels does not count towards the achievement. This is because the Wall-nuts are not actually planted by the player, but instead automatically placed there because they are endangered.
 * Shell on Wheels and Pod Squad are the only achievements to have a minecart in their icons.