(After receiving the note)
Penny: This poster shows that the zombies are coming up with a plan to eat the brains.
Crazy Dave: Oh! My brain turns out to be so worthy.
Penny: Not necessarily. It says they don't want brains of crazy people up there.
The player had to deal with the Poncho Zombie and the Zombie Bull. Poncho Zombie could be a big threat because of how much health it could have, and even worse, it is Level 2, so bringing Level 2 plants or bringing Acid Lemon was highly recommended. The Zombie Bull could launch a Zombie Bull Rider deep into defenses. The player should have brought along plants that can take out crowds of zombies, as well as powerful plants. Bringing strong attack plants and to deal with the Zombie Bull was recommended.
When the final wave is almost started, Prospector Zombies would appear in every lane, which could cause the player's minecart plants to be eaten. Bringing an ice attacking plant or a backward attacking plant was also recommended.