When Dr. Zomboss comes down to throw an ice ball or fire ball, you can use Freeze Shrooms to freeze him. This allows your various pults time to get some damage on Dr. Zomboss himself. Jalapenos will also cause damage to him when he is down to toss a fire or ice ball. The more damage you can do to Dr. Zomboss, the faster and easier it is to end this level. Save at least one Freeze Shroom and one Jalapeno for whatever he tosses.
Press R1 + R2 + L1 + L2 during game play, then enter one of the following codes during game play to activate the corresponding cheat function. Note: Your Tree Of Wisdom must be a certain height before some codes can be enabled.
Press R1 + R2 + L1 + L2 during game play, then enter one of the following codes during game play to activate the corresponding cheat function. Note: Your Tree Of Wisdom must be a certain height before some codes can be enabled.
Type These Codes In At Any Time While Playing The Game. Note: Some codes require your Tree of Wisdom to be of a certain height before they will work.During gameplay press R1 + R2 + L1 + L2
Use the following plant formation with the following items.
In the morning:
0 1 2 3 4 6 80 1 2 3 4 6 80 1 2 3 4 6 80 1 2 3 4 6 80 1 2 3 4 6 8At night:
0 2 3 4 9 X 7 7 7 60 2 3 4 9 X 7 7 7 60 2 3 4 9 X 7 7 7 60 2 3 4 9 X 7 7 7 60 2 3 4 9 X 7 7 7 6The final Boss will launch massive fire balls and ice balls at your plants. They will crush everything in their path except for zombies (basically, all plants in that row). To destroy the ice ball, use a Chili Pepper in that row. To destroy the fire ball, use an Ice Shroom, but also with a Coffee Bean or else it will fall asleep.
 Type mustache during a level after you finish selecting your plants.
 Note: This requires some time and skill. Start by crushing the green ones where plants are, in this order.
Try to smash the vases in columns, then wait for the zombies to get to another vase column and smash them. Your goal is to make them walk as one group and to gather them. They will eventually meet a squash at the start of the lane and it will "squash" them all. This may require several attempts.
 You cannot place the Hypno-Shroom in front of a Disco Zombie because he will raise four zombies, and one of them will be at front of Disco Zombie. Place the Hypno Shroom at his feet the moment he raises the four zombies. By doing this, the shroom will be at the center and Disco Zombie will have to eat it.