Note

"Is that a brain grill?"

- Crazy Dave

Notes are pieces of paper dropped and written by the Zombies. Each note precedes a conveyor-belt level, the last level of a stage, and alerts the player to the fact that the next level will be a conveyor-belt level. The normal notes have horrible grammar and handwriting, since the Zombies are all unintelligent. However, Because of his intelligence, Dr. Zomboss has excellent grammar and wonderful cursive handwriting, with Brush Script style.

Plants vs. Zombies
In Plants vs. Zombies, the note is earned after completing the ninth level in an area. When the player picks it up, the note will disappear into some stars. The screen will then fade, and the note will be revealed to the player. If the player clicks the "Okay!" button at the bottom of the screen, the tenth level will start.

Help Note
The "Help" section of Plants vs. Zombies can be accessed from the main menu (in the iPod Touch and iPhone version, it is accessed by the option menu), and turns out to be a sloppily written note (similar to those seen at the 9th level of every stage of Adventure Mode and at the end of the last level) appears.

However, this note is not in the PS3/XBox360/PSVita version, as it is replaced by an actual help menu (altough it is on a piece of paper that looks like a note from the zombies).

Help for Plants and Zombies Game

When the Zombies show up, just sit there and don't do anything. You win the game when the Zombies get to your houze.

-this help section brought to you by the Zombies

About the Help Note
There is no doubt that this was put in as a joke as the player gets some help when first playing the game (as well as a digital manual that comes with computer versions of the game, readme.html, and an instruction booklet with the Nintendo DS version), and as it says it was made by the zombies. For some versions, instead of an in-game help section, PopCap Games decided to put in a unique feature, the Tree of Wisdom, that gives the player tips on playing the game the higher it is grown. It will stop giving tips after it is grown it to 1,000 feet (after 50 feet, it will only give 'milestone tips', tips until grown to 100, 500, and 1,000 feet).

Plants vs. Zombies 2: It's About Time
Notes return in Plants vs. Zombies 2: It's About Time. The note still drops on the lawn like in the predecessor, but the writing itself is based on the world it is found in.
 * In Ancient Egypt, the note has hieroglyphs.
 * In Pirate Seas, the note is a treasure map.
 * In Wild West, the note is a "Wanted" poster.
 * In Far Future, there is a futuristic file.
 * In Dark Ages, the note is a scroll.

Plants vs. Zombies

 * The note the player receives before facing Dr. Zomboss has a background on a lawn, instead of the roof, where it was obtained.
 * Maybe it's because the weather became windy and the note fell off the Roof.
 * The note you get in the fog Levels says that it is your mother. This is the only place where it says the player has a mother in the game, but the note was written by the zombies so it is unknown if its true or not if the player's mom is still around.
 * The zombies ask you to leave your front door open and your lawn unguarded while you leave the house, but the zombies can't eat your brains if you're not in the house, so it seems a bit pointless.
 * This is probably so the zombies can set up an ambush.
 * The Roof note was made using Brush Script MT.

Plants vs. Zombies 2: It's About Time

 * The notes now include a dialogue with Penny and Crazy Dave.
 * In the Ancient Egypt note, above the "brain grill," you can see a Wall-nut with a ladder next to it,  which might be a reference to the Ladder Zombie from Plants vs. Zombies.
 * Also viewed in the note: Peashooter, Sunflower, Lawn Mower, Potato Mine, shovel, Cherry Bomb, a zombie rising from a grave and a mustache (maybe referring to Mustache Mode from Plants vs. Zombies) appear.
 * There also is what could be small face of Crazy Dave. (there is also a screw and a ball above this picture, maybe referring to his craziness)
 * The Far Future note is a reference to Error 404, which means the information does not exist.