Negg
Neggs are Neopet items - generally food or battledome weapons - that resemble eggs, but have stems, suggesting that they are grown from plants. There are two general categories for neggs: neggs that may be exchangeable for negg points, and neggs that can be bought at the Neggery for Neggpoints.
Regular neggs can be bought at the food shop in Neopia Central. Most, but not all of these neggs can be exchanged at the Neggery for a set number of Neggpoints. The penultimate of these is the Fish Negg, which is a retired negg, worth 50 Neggpoints.
Neggs that can be purchased from the Neggery have varying prices (up to a few hundred) and have unique results when fed to your pet, or used in the Battledome. The effects of many neggs are not absolutely certain due to generally high costs preventing experimentation. A list of the Neggery neggs and their effects, to the best of public knowledge will eventually be available on Neggery Negg Effects (which is being debated if it should be added to this wiki still).