Activity Arouser

The Activity Arouser (called Activity Booster in the European version of ) is a treasure found in Pikmin 2. It is found in the third sublevel in the Submerged Castle, inside the body of one of the two Withering Blowhogs in the sublevel. The Activity Arouser is actually a tennis balls lid.

In the European version of Pikmin 2, this is a bottle cap. It is found where the Creative Inspiration is in the North American version, inside one of the Yellow Wollywogs on sublevel 2 of Citadel of Spiders.

In the Japanese version, the treasure is replaced by the Anywhere Floater.

In the Switch port, the treasure is a generic tennis ball lid.

Naming
The treasure's name consists of "activity", referring in this case to recreational pursuits or pastimes, and "arouser", meaning something that excites or provokes. The treasure seems to evoke excitement and the desire to exercise for Olimar and the Hocotate ship, which fits the connotation of a Wilson tennis ball lid. "Arouse" often has the connotation of being sexually excited, which is probably why the name was changed to Activity Booster in the European version of New Play Control! Pikmin 2.

Internally, the treasure has different names based on region, since it occurs in different locations. In the US version, the Activity Arouser has the internal name, "futa" translating to "lid" and "nihonraku" translating roughly to "Japan music" (it is unknown what "g" refers to). The US treasure occurs in the same location as the Anywhere Floater, a Mainichi-brand milk cover in the Japanese version. In the European version, the treasure is internally called  – "titiyas" roughly meaning "Chichiyasu;" – because it occurs in the same location as the Milky Team, a Chichiyasu-brand milk cover in the Japanese version.

Glitch
This treasure on the US version of Pikmin 2 can be subject to the tilted object glitch. Occasionally, it will get stuck slightly in the ground after dropping from the Withering Blowhog, or will be pushed into the ground from other objects. If the Pikmin try to carry the treasure in this state, there is a chance that it can fall through the cave, and kill some of the Pikmin carrying it.