Board Thread:Plants vs. Zombies Wiki discussion/@comment-26239911-20160514132132/@comment-33574414-20160514134246

Among of the all the worlds except Modern Day, the hardest Zomboss Battle is Zombot Sharktronic Sub in BWB because there are many annoying zombies including sharks destroying the plants.

Meanwhile, the hardest Zomboss Battle in Modern Day is Zombot Dinotronic Mechasaur because he always targeted the Moonflower that causes the level too difficult and the dinosaurs also cleaning the lawn very quickly.