Disguised Delicacy

The Disguised Delicacy is a treasure in Pikmin 2 and, and a fruit in Pikmin 3. It is a. In Pikmin 2, it is found at the start of the Dream Den, while in Pikmin 3, it can be found in the Distant Tundra and the Tropical Wilds. In Pikmin 4, it can be found in the Secluded Courtyard, the Subzero Sauna, and the Plunder Palace.

Collecting the treasure in Pikmin 2
The Disguised Delicacy can be found on the first floor of the Dream Den in the Wistful Wild. The sublevel contains multiple Dwarf Orange Bulborbs, Lesser Spotted Jellyfloats, a Hermit Crawmad, and gas pipes between this treasure and the ship.

Tropical Wilds
The one in the Tropical Wilds is being held by the Shaggy Long Legs. Defeat the mini-boss to get the fruit. To find the Shaggy Long Legs, you must break the electric gate being guarded by an Orange Bulborb near the Dawn Pustules. The Orange Bulborb can be taken out with bomb rocks buried nearby. Note that the fruit will drop out of the Shaggy Long Legs wherever it is defeated, which could be in either of its 2 arenas.

Distant Tundra
The one in the Distant Tundra is in a large crystal in the room with the Yellow Onion, but requires Rock Pikmin to get, meaning that the double bridge must be built before attempting to retrieve the fruit.

Secluded Courtyard
There is a Disguised Delicacy behind a corner in the center of sublevel 2 of the Secluded Courtyard. Upon approaching it, an Anode Dweevil will fall from the ceiling and attack you, so it must be dealt with. To collect this treasure, you must throw 5 Pikmin at it.

Subzero Sauna
There is a Disguised Delicacy inside of a large hydro jelly near the northeastern section of sublevel 1 of the Subzero Sauna. To collect this treasure, you must first burst the hydro jelly, then throw 5 Pikmin at it. It is recommended to defeat the Snowy Blowhogs nearby.

Plunder Palace
There is a Disguised Delicacy sitting atop a high-up table alongside the Sweet Torrent near the center of sublevel 5 of the Plunder Palace. To get to it, you will need access to the corridors going in a circle, and then ride on a floating platform that can take you up. Upon approaching the treasure, a Puffy Blowhog will descend from the ceiling and attack you, which must be defeated before attempting to collect it. To collect this treasure, you must throw 5 Pikmin at it. A nearby Giant Breadbug may attempt to steal it, in which case you will need to either damage it or best it in tug-of-war.

Trivia

 * Olimar's comments for this treasure in Pikmin 2 and Pikmin 4 coincide with the basic plot of Pikmin 3.