Cuke

The Cuke is an instant-use plant in Plants vs. Zombies: The Final Showdown based on the plant from Plants vs. Zombies: Garden Warfare and Plants vs. Zombies Heroes.

When planted, it launches into the air and will come crashing down a few seconds later, causing an explosion across the entire screen, instantly killing any zombie, including Micro Bosses.

However, this comes with two enormous downsides: It costs an incredibly high 2,500 Sun, more than any other plant in PvZ: The Final Showdown (besides Berrainy or Evil-shroom due to increasing costs), and it never recharges. Once used, it will not recharge at all, even between flags in Survival: Endless modes.

It is unlocked after beating the "Last Stand" side path in The Great Graveyard.

Made by Milesprower2.

Origin
His name is a portmanteau of "cucumber", the plant this is based on, and "nuke", an extremely powerful and dangerous explosive.

Almanac Entry
Cuke

A literal "kill all zombies" button, but it costs a lot and can only be used once.

Damage: infinite

Range: whole screen

Usage: single-use, instant

The Cuke is the pinnacle of plant engineering, the most powerful weapon ever created...but it is so powerful and dangerous that the plants are always hesitant to use it. Thankfully for them, the explosion somehow leaves them unharmed.

Cost: 2,500

Strategies
Due to its immense cost, this is hardly going to find use in shorter levels, and due to it never recharging, it won't find use in Endless modes either. It can essentially be used as a filler plant for long 4 or 5-flag levels, serving as a panic button if you've saved up some sun and things go wrong later in the level.

The Cuke can also serve as an effective way to eliminate any threat posed by the final wave in particularly long levels, especially if those levels contain Gargantuars, Undying Zombies, Z-Mechs, or any Micro Bosses, due to eliminating every single zombie in the wave effortlessly, however even in a long level it will likely require heavy sun production to afford.