Essence (Type)

The "Essence" type is also known as "Raw" or "Pure".

The explaination for this type is that all Pokemon have an amount of a strange life-energy known as Essence. However with most Pokemon it is "focused" into something: E.G the "Essence" of a Fire type is focused in such a way that it creates fire and related capabilities, and Electric types generate electricity with their Essence. Essence (creatures) however haven't got focused energy; all they can do is release this pure form of energy in various ways and hope to use it by the sheer force and power behind it.

It is mutually defencively weak to things that use more offencive forms of this energy; e.g. Dark, Dragon, Essence and Psychic.

It it also has an offencive weakness only to Sound because sound is difficult for the energy to make contact with.

It is offencively strong against Rock, Ground and Ice due to the three being broken by the sheer force of these types of attacks.

It is defencively weak to Electric and Sound (for whatever reasons).

It has a defencive strength only to Normal due to it being the only type that doesn't use any form of Essence to attack.

It's immune to nothing and nothing is immune to it.

Essence types take 1.05* damage from all types that it's not directly stated to be weak or resistant to.

Unfortunately a lot of the abilities Essence Pokemon use draw (as expected) from their Essence; their life-energy. Which as a result can cause significant harm if too much is drawn from.

Defencive/Offencive capabilities
Essence types typically have very high attack and special attack stats, complimenting their high amount of offencive strengths. Their move-pools are also often very damage-oriented, designed to overwhelm opponents with their sheer brutish force and potentially crippling side-effects.

Their defencive capabilities are rather poor however. Despite having a often massive amount of health to compensate for the need to draw from their own life in order to use their more potent attacks, their defence is staggeringly low and Essence types take abnormally high damage from almost everything including its own type.

Abilities
Crude Ice