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Prehistoric Ages - Day 20 was the twentieth and last level of Prehistoric Ages in Plants vs. Zombies: All Stars.


  • The boss could deal heavy damage to all plants, so the player should've made sure that Wall-nut's skill was activated before the boss activated its skill.


The two small numbers next to the zombie icon mean that zombie appeared there, while the small number on the left displayed the lane where the zombie would appear, and the one on the right displayed the column that the zombie appeared in. If there's only one small number next to the zombie icon, then it means that that zombie appeared at the beginning of the lawn, and at the lane that the number displays. Example: Basic Zombie2.png3-5 means that a Basic Zombie appeared in the third lane, at the fifth column. Note that this only displays the position of the zombies that have the highest chance of spawning.
Waves Zombies Note(s)
1 Mask ZombieAS.png 1-6 Primitive Conehead ZombieAS.png 3-6 Club ZombieAS.png 2-6
Slingshot ZombieAS.png 1-8 Slingshot ZombieAS.png 2-8
2 Mammoth Rider ZombieAS.png Slingshot ZombieAS.png 2-10 No zombie will move from their position due to this wave being a big boss wave.
Final wave


See Prehistoric Ages - Day 5#Strategies



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