Survival: Pool (Hard)

Survival: Pool (Hard) is the eighth level of Survival Mode in Plants vs. Zombies and Plants vs. Zombies: Journey to the West. It contains ten waves of zombie hordes divided by two flags for each and for every two flags survived, the player will be given a chance to strategize by changing the set of plants they chose from the previous waves.

Strategies
Any normal Pool strategy will work here. Alternatively, you can use any Survival: Endless strategy that can survive at least ten flags. You can use many strategies, but a fire pea strategy works particularly well. Use Repeaters and plant Torchwoods in front of them. Try to get Cattails and Cob Cannons, too. Eliminate the harder zombies with Spikerocks and place Pumpkins on your front row of shooters to watch out for Imps.