Monarch Hole

Monarch Hole is the thirteenth cave explored in Pikmin: The War of the Pikmin Planet. Many Grub-dogs reside in this cave. This is also the first cave where a previous boss is encountered.

Enemies

 * Yellow Bulborb x3
 * Dwarf Yellow Bulborb x7

A lot of Yellow Bulborbs await you on sublevel one. If you have to attack any, try to surprise them from behind. The hole has a clog in it.

Enemies

 * Dwarf Red Bulborb x7
 * Red Bulborb x3
 * Fiery Bulblax

Fire geysers and pools of water are abundant here. A Fiery Bulblax holds the key; attack it from behind with Red Pikmin, preferably with ultra-spicy spray. Once it is dead, proceed to the next sublevel.

Enemies

 * Blue Bulborb x3
 * Water Dumple x7

Water floods most of this sublevel. A new variety of Bulborb, the Blue Bulborb, resides here. They have a little more health than Red Bulborbs, but they are slower when out of water. They do not have a Breadbug mimic, but Water Dumples are actually their offspring. One of the Blue Bulborbs has the key.

Enemies

 * Bulbmin

Ten fiesty Bulbmin and their leader are waiting for you here. Other than that, this is a rest sublevel. A Garnet Candypop Bud and an Ivory Candypop Bud are here, as well as a geyser.

Enemies

 * Hairy Bulborb x3
 * Snow Bulborb x7

There are many poison hazards here. Use your White Pikmin to take them out, then go for the hole, which is buried.

Sublevel 6
Another rest sublevel. Two Queen Candypop Buds are here to help.

Enemies

 * Empress Bulblax (can't produce larva)

An Empress Bulblax guards the penultimate sublevel. Luckily, it can't produce larva. Just dodge its rolls and you'll be okay. The hole appears when it is dead.

Enemies

 * Emperor Bulblax

The final sublevel consists of a small shrine, with two eyes sticking out of the ground in the middle of it. Approach them, and a real Emperor Bulblax comes out. You have to dodge its slimy tongue, and don't get too close to it, or it will flatten anything under it. It can also roar, which makes your Pikmin run around in fear. After it succumbs to the damage, it roars loudly and dies, leaving its body behind. The Dark Den is now unlocked!