Anxious Sprout

The Anxious Sprout is a treasure found in Pikmin 2 and Pikmin 4. It is a sprout. In Pikmin 2, the treasure is found on sublevel 5 of the Bulblax Kingdom, a sublevel known for its extreme darkness, Dwarf Orange Bulborbs, Orange Bulborbs, and its maze-like layout along with many bomb-rocks. In Pikmin 4, it is likewise found in a dangerous cave, the Kingdom of Beasts, and is once again found buried, this time entirely.

Collecting the treasure in Pikmin 2
It is mostly buried in the ground, with only a small tip visible. Use White Pikmin to quickly dig it out. Be careful while digging it out, because there is a good chance this will trigger a bomb-rock to fall onto your working Pikmin.

Kingdom of Beasts
There is an Anxious Sprout completely buried near the southeastern corner of sublevel 2 of the Kingdom of Beasts. It can be located with the Treasure Gauge or Oatchi. It is guarded by an Orange Bulborb, which should be defeated before attempting to collect this treasure, although it is not strictly necessary. To collect this treasure, you must throw 10 Pikmin in its vicinity.

Giant's Hearth
It is half-buried in a mound of ash near the mid-north of the overworld. It is guarded by two Dwarf Bulbears, which should be defeated before attempting to collect it. To collect this treasure, you must throw 10 Pikmin at it.