Pikmin Adventure enemies
Red Bulborb
Red Bulborbs the most common Bulborb, and are battled in almost every level of Pikmin Adventure. They are usually small, but big ones can be found occasionally.
Monita's Notes
"These grub-dog predators tend to sleep during the day and attack aggressively if woken from a nap. Bulborbs come in a wide variety of colors--now on sale at our gift shop!"
Strategy
Red Bulborbs are amongst the easiest to kill of all the enemies in Pikmin Adventure. However, should they get ahold of a player, they will do 1 of 2 things: They will either grab the player in their mouths, swing them around, and then toss them far away, or they will eat the player, turning them into Droppings, making it impossible for them to be whistled at or for them to attack, and they must be broken out by Olimar or other Pikmin.
The only weak spot Red Bulborbs have are their backs, which, due to their quick speed and jumpy movements, make it somewhat challenging for Olimar to attack. It is best advised that players controlling Pikmin themselves attack these enemies to take them down swiftly without any damage.
Yellow Bulborb
Yellow Bulborbs are another class of mechanical Bulborbs fought in Pikmin Adventure, and act as the first mini-boss in the minigame. These ones, in particular, are essentially mechanized versions of the Yellow Bulborbs seen in beta footage of Pikmin 2. Yellow Bulborbs are usually larger than the Red Bulborbs.
Strategy
To defeat Yellow Bulborbs, the player can either attack the weak spots on their sides, or, in the smaller variations, attack the weakspots on their heads.
Yellow Bulborbs, in addition to their basic melee biting attack, are capable of spewing orbs of water thet ensnare players, rendering them helpless and useless until they are freed. If a player is trapped in a water bubble, they can be freed by having other Pikmin attack them. Unlike other types of Bulborbs, Yellows have the ability to charge at players which will instantly kill smaller Pikmin and damage larger ones. They have difficulty changing direction while charging, however, so this attack isn't too difficult to avoid.
Green Bulborb
Green Bulborbs are semi-common foes encountered in Pikmin Adventure, and are larger than most Mecha Bulborbs. They usually appear in enclosed areas, requiring the player to manually break them out, or in dark areas, requiring the player to use the nearby Glowing Mushroom to upgrade their light source.
Strategy
Green Bulborbs are basically just larger versions of the Yellow Bulborbs, the only major differences being their coloration, size, and 2 extra weakpoints on their sides. Attacking their sides is a good strategy to go by if the player is in control of Olimar, and player Pikmin can reach the top weakpoint easier.
It should be noted, however, that Green Bulborbs are usually spawned with bombs available near them, so it would be advised that if you are low on hearts, to simply take them out with bombs before they even wake up.
Bilious Bulborb
Bilious Bulborbs are the largest of all the common mechanical Bulborbs found throughout Pikmin Adventure, and is the second miniboss the player fights. It's eyes and color make it resemble the Orange Bulborb from Pikmin 2. They have smaller spots than normal, so it is suggested that they may not be part of the Bulborb subspecies.
Monita's Notes
"The different size spots suggest that these may not be a true subspecies of Bulborb at all. Or perhaps they're normal Bulborbs feeling a little under the weather."
Strategy
Upon entering its area, the mechanical beast will awaken and the battle will begin with a roar. Rather than charging the player like most enemies do, the Bilious Bulborb will instead stand in place and shoot Spike Balls out of its mouth. If the player or Pikmin are equipped with a Hammer Seed or Knuckle Seed, they can avoid this attack at the expense of losing the powerup.
The best way to defeat this creature is on multiplayer, as getting behind it is difficult on single player. Have the player controlling Olimar run around so the other Mii Pikmin can get to the weakpoints dotting its back. Once the miniboss has taken enough damage, it will rage and get faster, and will be quicker to shake off Pikmin. Fortunately, the stage may have rocks at its edges. If it does, Olimar or the Pikmin can pick these up to throw them at the boss. If the rocks hit the creature on a weakpoint or directly on its face, it will be dazed for a few seconds. If utilized properly, the rocks can turn the tide in a losing battle and save the player.