An Empty Black Essence Jar is crafted in the crafting table from Wooden Slab, Glass, Black Dye, and a Crystal Block. It fills up when the player defeats wild Pokemon with a essense jar in inventory.
Essence Jar Black Empty
An Essence Jar Black Empty is a Pixelmon mod block with ID tcg:essence_jar. In creative mode, it can be found in the TCG tab.
/give @p tcg:essence_jar