Dark Alchemy

Dark Alchemy is a Brain Buster exclusive to Dark Ages. There are potions on the lawn that can give zombies effects. It is important to select seeds carefully in this Brain Buster. Zombie arms will go up with a potion and go back down, leaving the potion. When a zombie steps on it, a cloud of that color will appear and it will grow to a giant, flashing the respective color. They will flash the color with the style when they are close to your home. Effects will stack up to three times per potion. Hypnotized zombies can also use potions. If different potions are used on one zombie, they will flash quickly one after the other. Hypnotized and unhypnotized Gargantuars can smash the potions. Zombies will instantly grow when they consume any potion.

Levels
All the levels have two flags.

Strategies
In this Brain Buster, it is highly recommended to bring the Fume-shroom, Bonk Choy, Grave Buster, Wall-nut, Iceberg Lettuce then you can bring anything after that. Plant three rows of Fume-Shrooms then a row of Bonk Choy and a row of Wall-nut. Use the Iceberg Lettuce when in need. You can do the same strategy, but replace the Bonk Choy with Magnifying Grass. If Knights, Wizards, or Jester get a hold of any potion, this can be damaging.

Trivia

 * This is the first Brain Buster that has objects that helps zombies get to the Player's House.
 * This Brain Buster refers to early usage of Alchemy and Black Magic during the Dark Ages.
 * If a hypnotized Gargantuar walks past a potion, the potion will appear to be in front of it.
 * This is the third Brain Buster that allows the player to choose their own plants, the first being the Powder Keg in Kung-Fu World, and the second is Sun Bombs in the Far Future.
 * When an affected zombie dies, it reverts to its normal size.
 * Hypnotized zombies can get potions' boosts too, despite that they are zombies' enemies.
 * The name of this Brain Buster was revealed by a survey from PopCap.
 * Gargantuars smash potions.