|Appears in||Pikmin 2|
|Scientific name||Oculus matriarcha|
|Underground areas||Frontier Cavern, Hole of Beasts, Hole of Heroes|
|Challenge Mode levels||Emperor's Realm|
|2-Player Battle levels||None|
|Max. carriers||30 Pikmin|
|Treasure value||15 Pokos|
|Attacks||Crushes Pikmin, causes boulders to fall, births larvae|
|Hit points||5000, 3300 in Hole of Beasts|
The Empress Bulblax is a boss-class enemy in Pikmin 2. Its markings and general features are similar to those of the Red Bulborb, but its body is much larger and composed of five distinct segments; its comparatively tiny legs dangle above the ground. In the Piklopedia, this creature sleeps and cannot be woken up.
The Empress Bulblax makes few appearances in the game: it is located on the last sublevel (5) of Hole of Beasts, sublevel 8 of Frontier Cavern, sublevel 11 of Hole of Heroes, and sublevel 4 of Emperor's Realm in Challenge Mode.
Olimar's Notes"Initial observations placed doubt on the capability of the grub-dog family to support a strong ant- or beelike social structure, but recent studies show the family is capable of such complexity. The egg sac of the largest female grub-dog within a given range swells to dramatic proportions in response to environmental changes, such as the sudden depletion of prey species. These females temporarily take on the role of pack matriarch. Also, in pack formation it has been observed that nearly all males not involved in species reproduction undergo natural sex changes. The characteristics of such specimens are quite intriguing indeed."
"For a sophisticated delicacy, make a pate de foie gras from this massively obese creature's liver and spread it over a sesame cracker."
To defeat this enemy, throw (preferably Purple) Pikmin onto its face and call them back before it throws them off. After shaking Pikmin off, the boss rolls from side to side across the chamber in an attempt to crush its aggressors, smashing into walls, and making rocks fall from the ceiling in most encounters in the game. Although risky, the Bulblax can be petrified if the spray is released on the middle of its elongated torso.
The Empress Bulblax is one of the few bosses that can vary depending on where the player encounters it: for the Hole of Beasts fight, it is easier to throw the Pikmin on the Empress Bulblax's side to the left and retreat to the alcove in the wall between attacks. Here, it is also effective to swarm the body from the left at the start of the battle, before the boss wakes up. Doing this will deal heavy damage if many Pikmin manage to latch onto the Empress.
This is not as effective in the later two battles, as the Pikmin have less time to attack the enemy before she shakes the Pikmin off, and they have the Empress continuously giving birth to Bulborb Larvae. These are easily defeated by their own mother's rolling; alternatively, in the Frontier Cavern, since the number that can exist is finite, they can be lured away from the Empress with one captain while the other fights the boss, resulting in a fight that is about as easy as in the Hole of Beasts. For the Hole of Heroes fight, the player starts off behind the Empress, and she can make boulders fall after hitting the walls; these are most easily avoided by moving behind the exit hole, itself behind a gate. All rules apply here the same as the Frontier Cavern fight, but trapping the larvae is nearly impossible, and requires a decoy captain who is in good condition.
When defeated, four of the Empress Bulblax's front body segments explode, leaving only the segment attached to the head, which can be returned to the Research Pod and cashed in for 15 pokos.
 Brawl Trophy Description
"A member of the grub-dog family, transformed by environmental factors. Due to her ridiculous size, the empress bulblax can no longer walk on her tiny legs. She just wiggles around, rolling from left to right. Although the female continues spawning bulborb larvae, she unfortunately rolls over them with her massive body."
- The Empress Bulblax may shed its skin; on the last sublevel of the Hole of Beasts, right underneath the Research Pod, there appears to be an Empress Bulblax skin on the floor, but this could just as easily be a warning left by previous explorers.
- The Bulblax also makes a cameo appearance in the game WarioWare: Smooth Moves, where the player must tilt the Wii-Remote to squish the Pikmin.
- It is impossible to wake up the Empress Bulblax in the Piklopedia, no matter how many Pikpik carrots are thrown at it.
- The Empress Bulblax is the only member of the Grub-dog family that does not kill Pikmin by eating them.
- It resembles a pregnant queen termite.
- Though the Emperor Bulblax is called the largest of the Grub-dog family in the Piklopedia, the Empress Bulbax is bigger while pregnant, as seen here.