Queenigma

Queenigma is a bounty plant in Plants vs. Zombies: Battle for Neighborville. She can be hunted in the Weirding Woods near the starting point. Defeating her unlocks the Diss from a Rose medal.

Origins
Her name is a portmanteau of the words, "queen" and "enigma."

Strategies
Queenigma is invincible when the spawned mushrooms are still present, as hinted by the "halt truffle kerfuffle" objective. Use the Super Brainz to take them down quickly. The Night Cap can be killed in one hit by using a fully charged fist, preventing her from turning invisible. Once they are taken care of, you have 20 seconds to defeat her before she turns invincible again, spawning even more mushrooms, so just attack her quickly with the fists until she is defeated.

Coin, taco, and XP farming
This bounty hunt can be exploited to quickly farm coins, tacos, and XP, especially in single player, as it is relatively quick to perform. However, this farming method is less efficient than the Bitey Brothers bounty hunt as the XP yield is lower.

Simply use the Super Brainz with Fearless and Leveling Up upgrades, and defeat her multiple times until you get the desired amount of them. Beating this bounty hunt gives you at least 5,000 coins, 10 tacos, and 535 XP (587 XP with Leveling Up), and it takes around 30-45 seconds to defeat her with only one player.