Locked and Loaded

"You must take these plants to win. Otherwise, you risk distorting reality."

- Penny

Locked and Loaded is a Brain Buster in Plants vs. Zombies 2: It's About Time where the player has to use the plants provided by Penny to defeat the zombies. In versions of the game before the 1.7 update, it is unlocked with four keys in Ancient Egypt and Pirate Seas. In the Wild West, it is unlocked using five keys. The player gets a star after completing a level without losing any Lawn Mowers prior to the 1.7 update. In versions 1.7 and afterwards, Locked and Loaded levels are simply placed like other Brain Busters in the map.

Levels
The Roman numerals are the the level numbers before the 1.7 update for all worlds except for Far Future, where it is used for disambiguation purposes. The parentheses show where the level is located after the 1.7 update, or if the level is removed in the update altogether.

Trivia

 * None of these levels have three flags.
 * Sometimes, the selection of plants may include a plant that the player has not yet unlocked.
 * One example is the Magnifying Grass in Far Future - Day 17.
 * According to Penny, the player is forced to use certain seeds because otherwise, he or she will risk distorting time.
 * The first level of every trio of Locked and Loaded levels feature the plant unlocked with it (Twin Sunflower, Cherry Bomb, and Winter Melon).
 * However, this does not apply to Dark Ages - Night 8, because to unlock the only plant that may be locked at that point, the Hypno-shroom, the player would have to buy it as it is a premium plant.
 * The third level of Locked and Loaded in Pirate Seas is the only Locked and Loaded level without sun-producing plants.
 * In Locked and Loaded, Last Stand, and Cannons Away, there is a bug that the screen will spawn a random zombie. They include Zombie, Seagull Zombie, and Pharaoh Zombie (with a broken sarcophagus). This happens to a small amount of users.
 * Pirate Seas - Day 5 and Dark Ages Night 18 are the only Locked and Loaded levels that use five plants; all others use six.
 * Kung-Fu World - Day 23 presents a combination of this and Last Stand.
 * Dark Ages - Night 8 and Night 18 is the only Locked and Loaded level that gives the player a premium plant (in this case, the Hypno-shroom and Pea-nut).