Ghoulcake

The Ghoulcake is a species of ghostly shellcake that harnesses wither and potentially gloom.

=In fanon games=

In Pikmin 2... Again?
The Ghoulcake is a shellcake in Pikmin 2... Again? controlled by the parasitic Gloomshroom. It resembles most others of its kind but is gray, and the underside of its body is covered by wither slime. Upon defeat, it reverts to the shellcake it was prior to being infected.