Ultra-Bitter Spray is the purple colored spray that the player can get from 10 purple berries from the Burgeoning Spiderwort plant, or by finding a concentrated dose. When used, it turns any nearby enemy into stone, rendering them unable to attack.
To do: Also, confirm that petrified enemies really have less defense. Exact values for that and the drops would be nice. Finally, add the chances of drops for bosses and the Titan Dweevil.
This spray can be deployed by pressing / . Any enemy in front of the captain turns into stone, and with that becomes immobilized. When an enemy is defeated during petrification, it will crumble to dust and leave behind one dosage of a liquid, this being either nectar or a spray. Bosses, however, will drop five doses of liquid. The Titan Dweevil will drop ten doses. The perceived chances of a single drop being nectar or a spray are as follows: 
|Ultra-Bitter Spray drop||7.5%|
|Ultra-Spicy Spray drop||7.5%|
Any regular enemy that becomes petrified will have its defense decreased, however, any petrified boss will have its defense increased. Plants and Candypop Buds cannot be petrified at all. Petrifying enemies that are in the process of eating any Pikmin will make it possible to save those Pikmin from dying.
The player can deploy Ultra-Bitter Spray by pressing / in the Piklopedia. This does not affect the Ultra-Bitter Spray quantity in the actual game.
In 2-Player Battle, this spray can also be used to disarm the opponent's Pikmin by planting them in the ground, and reverting all flower and bud Pikmin to leaves. Although the Pikmin will automatically jump back out of the ground after ten seconds, they will not regain their buds or flowers.
The main method to obtain an Ultra-Bitter Spray is to collect ten Ultra-Bitter berries, which can be retrieved from Burgeoning Spiderworts. Alternately, concentrated doses of the spray can be found in blobs. These doses may be found by destroying eggs, fighting Doodlebugs, killing the insects at the Wistful Wild, killing purple Unmarked Spectralids, and defeating any petrified enemy.
The concentrated drops will only appear after the spray has been concocted from the berries at least once. Once the first berry is delivered to the ship, it will announce its properties and request another specimen. After delivering nine more, the first spray is created.
There are less Ultra-Bitter berry carrying Burgeoning Spiderworts, which makes the spray rarer to obtain in comparison to ultra-spicy sprays. In addition, this spray is also normally only discovered after the spicy one.
- For each enemy, there is a multiplier setting for how long the petrification should last, but it makes no difference, as all enemies have this value set to 1.0.
- These values are obtained from a fan-driven experiment, rounded to what are the most likely real values.