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


  • The boss can deal heavy damage to all plants, so the player should make sure that Wall-nut's skill is activated before the boss activates its skill.


The two small numbers next to the zombie icon means that zombie will appear there, with the small number on the left displays the lane that the zombie will appear, and the one on the right displays the column that the zombie will appear. If there's only one small number next to the zombie icon, then it means that that zombie appears at the beginning of the lawn, and at the lane that the number displays. Example: Basic Zombie23-5 means that a Basic Zombie will appear in the third lane, at the fifth column. Note that this only displays the position of the zombies that have the most chance to happen.
Waves Zombies Note(s)
1 Mask ZombieAS 1-6 Primitive Conehead ZombieAS 3-6 Club ZombieAS 2-6
Slingshot ZombieAS 1-8 Slingshot ZombieAS 2-8
2 Mammoth Rider ZombieAS Slingshot ZombieAS 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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