Black nectar

Black nectar is a type of nectar that is often detrimental to Pikmin but can have other uses.

=In fanon games=

In Pikspore
Black nectar is a type of nectar in Pikspore that reverts the maturity of a Pikmin that drinks from a blob of it to the leaf stage. Certain enemies utilize this horrible goop and it is sometimes left behind by enemies like the Gulagg after defeat. Black nectar can be destroyed by Black Pikmin, the only Pikmin immune to its negative effects. When leaders touch black nectar, it sticks to them, gradually draining their health and slowing them considerably, but it can be removed by rapidly twirling the control stick.

In Pikmin 2... Again?
Spoiled nectar is a aged nectar in Pikmin 2... Again?. It is similar to the normal nectar, however, having a visible purple tint on it visibly. It has a chance to come out of nectar eggs, and if a Pikmin drinks a spoiled nectar their current maturity of not the leaf will revert straight at the leaf stage, for leaf maturity Pikmin, nothing will happen to them. If a Swarming Sheargrub drinks a spoiled nectar they'll get damaged.