Code Orange! Citron Invades!

Unreleased '''Code Orange! Citron Invades!' is the fourth mission for the Zombie Side in Plants vs. Zombies Heroes''. The main opposing plant hero in this mission is Citron. This mission also features Captain Combustible and Wall-Knight opposing plant heroes.

Plot
Citron, Rose, and Grass Knuckles attempt to replace the zombie flag with their own flag in the moon. Dr. Zomboss finds out and sends out Z-Mech, Rustbolt, and Brain Freeze to stop them.