Citrus Lump

The Citrus Lump is a treasure in  and, and a fruit in. It is actually a or a. In Pikmin 2, it is found in the first sublevel of the Emergence Cave. In Pikmin 3, it is found in the Garden of Hope, the Distant Tundra and the Twilight River. In Pikmin 4, it can be found in four different caves.

Collecting the treasure in Pikmin 2
The Citrus Lump is one of the first treasures seen in the game. It is found in the first sublevel of the Emergence Cave, and can easily be brought to the ship's pod without any trouble, as it usually isn't guarded by the group of 4 Snow Bulborbs.

Garden of Hope
The Citrus Lump in the Garden of Hope can only be accessed once the Hocotatian has escaped. In the second half of the area, go into the water and lift the bamboo gate. There will be many Puckering Blinnows along the way, so make sure to bring plenty of Blue Pikmin. Beyond the bamboo gate, to the right, lays a small path, and the Citrus Lump is at the end. To carry it back, the tin box near the Waddlepus and the Burgeoning Spiderwort must have been dropped into the water.

Cave
A Citrus Lump can be found in the cavern with the Pyroclasmic Slooches. In the room, the lights must have been turned on. Afterwards, throw a leader up onto the higher Bloominous Stemple along with a few Pikmin. Proceed to carry the fruit back, but watch out for enemies on the way back.

Outside
It is recommended that this Citrus Lump is obtained after Charlie has been rescued. Throw two leaders onto the plateau with the Dodge Whistle. To the far right of the plateau is a Bouncy Mushroom. Throw one leader and some Yellow Pikmin onto the mushroom. They will arrive on another plateau, where the Citrus Lump is partially buried. There are two Bearded Amprats that guard the fruit. Kill the Amprats and the Arctic Cannon Larva and build the stack of hay, and proceed to carry the fruit back. It helps if the electric gate next to the landing site is destroyed. If Charlie has not been rescued, Pikmin alone can be thrown across the Bouncy Mushrooms and will notice the fruit as soon as they land. After digging it up, they can usually make it past the enemies unharmed and carry it back to the ship.

Twilight River
The Citrus Lump in the Twilight River requires Blue Pikmin to collect it. The fruit is in the river near the two Dwarf Orange Bulborbs. From that area, go right near the small waterfall, and the Citrus Lump will be seen. Simply put 5 or more Pikmin on it to carry it back to the S.S. Drake.

Secluded Courtyard
There is a Citrus Lump hanging from a cobweb near the center of sublevel 1 of the Secluded Courtyard, right next to the entrance. To collect this treasure, you must stand on the nearby ledge and throw 7 Pikmin at it.

Doppelgänger's Den
There is a Citrus Lump sitting on a ledge in the southeastern corner of sublevel 3 of the Doppelgänger's Den. To collect this treasure, you must first open the iron fences by pressing the button at the south of the sublevel as you pass by it while on the moving walkways. Then, either throw 7 Pikmin at it. You will need to reverse the direction of the conveyor belts to collect it, or use Blue Pikmin and change the location of the base.

Frozen Inferno
There is a Citrus Lump on a circular platform near the southwest of sublevel 3 of the Frozen Inferno, right next to base. To collect this treasure, you must throw a fire starter at the bundles of dry plants surrounding it, then throw 7 Pikmin at it.

Cradle of the Beast
There is a Citrus Lump in the southeastern corner of sublevel 1 of the Cradle of the Beast. It is guarded by a Puffy Blowhog and a Scorchcake, which should be defeated before attempting to collect it. To collect this treasure, you must compress the bag in front of it with 30 Pikmin, then throw 7 Pikmin at it.

Trivia

 * In Pikmin 3, all the instances of this fruit together create 6 bottles of juice, an amount tied with the Stellar Extrusion for the most bottles from a single type of fruit.
 * Oddly, this fruit creates yellow juice, though tangerine juice is orange in real life.