ZPS
- Not to be confused with ZPG.
ZPS (short for Zomboss Positioning System) is a tool in Penny's Pursuit in Plants vs. Zombies 2 which allows you to earn ZPS points.
The way the ZPS work is every time you complete a level in Penny's Pursuit you will earn ZPS, depending on the level you can get 20% ZPS points in Mild levels, 25% ZPS points in Spicy levels, or 30% ZPS points in Extra Hot levels. Once ZPS reaches 100%, it will say "Fight!", which means that you can battle Dr. Zomboss 3 times.
Once the 3rd battle is over, the ZPS resets back to 0% and will say "Out to Lunch," meaning that even though you can still fill up the ZPS, you cannot battle Zomboss until the next day at 1:00 PM. ZPS caps at 620% and attempting to get more will result in not obtaining it, meaning that you can only have 6 Zomboss fights, but sometimes that limit can increase.