Have used these a few times in my games, usually as slave labor in a dark twisted dungeon. These are mystical candy-makers, often found in factories anywhere in the Prime or Outer Planes.
Small Sized Humanoid
Hit Dice: 2d8 (9 hp)
Speed: 20 feet (4 squares)
Armor Class: 13 (+2 Dex +1 size), touch 12, flat-footed 11
Base Attack/Grapple: +0/-3
Attack: Slam +2 melee (cudgel 1d3)
Special Qualities: low-light vision, teamwork
Saves: Fort +1, Ref +3, Will +1
Abilities: Str 10, Dex 14, Con 10, Int 12, Wis 11, Cha 15
Skills: Craft (any) +3, Perform (Any) +5, Profession (Chocolatier) +5
Feats: Skill Focus (Any Candymaking Skill)
Environment: Any (Loompaland or candy Factory)
Organization: Usually in a Workteam (5-8)
Challenge Rating: 1
Treasure: Standard, items
Alignment: Usually Lawful Neutral
Level Adjustment: Most Gain Levels as Craftsman (Rogue or Bard 10th level Max)
Skill Focus (Candy creation): They have a long history of working with confectionery, gaining +3 in any related profession.
Teamwork: Gain +1 bonus on manual skills performed with their kin. They can gain a bonus up to the number of their kin working with them, normally five for projects.
Oompa-Loompae are known for their small size, colourful hair, orange skin, and white pants with loud boisterous voices. They are mischievous, love good-nature practical jokes, and singing. While not actually fey, they have a personality that fits in with them. They also get along with dwarves and halflings as well. While not always keen for humans, they do appreciate craftsmen who dedicate themselves to an art form.
The few of their kin who do not specialize in candy making usually become rogues and bards.to help take care of their factory home. Rogues take care of security, setting up traps to stop intruders. Bards to encourage the workers and but occasionally to help stop misfits that have found their way into the factory. They also accept small sized humanoids to assist them in their homes - such as halflings, fey or dwarves if they show talent in confectionery or magic.
Though it has never been proven, many believe the Oompa-Loompa are heavy drinkers. There are many unsubstantiated stories of balooshes (beer bashes) that happen at night when the factory is closed, as the fey from Santa's workshop and rabbits from the High Bunny's Warren come over for events.