This Article Contains information directly from the Pikmin Games. This article is based off of an Enemy/Treasure/Area/Cave/Pikmin/Character from the Pikmin series of Games.
The Happiness Emblem is a treasure in Pikmin 2, it is actually a cap for a Squirt soda drink. It is found on Sublevel 4 of the Glutton's Kitchen, and is held by a powerful Spotty Bulbear. Once it is defeated however, it may be subject to thievery by Breadbugs.
On it, it reads:
CITRIC ACID, GRAPEFRUIT DIL
In the PAL version of Pikmin 2, this is a 'Fristi' bottle cap.