Dark Matter

''"If it's Dark Matter we're up against, we don't have much time. It'd be a disaster if it completely took over Spectra and gained all that power..." ''- FCN

Dark Matter is a sentient clump of dark mass capable of possessing whoever it chooses and a servant of 0. It exists in both Kirby and Cloud's dimensions, appearing in Cloud's when FCN accidentally linked the two dimensions while using his space alternator device.

Role in Cloud's Forum Adventures
Luna was the first to be possessed by Dark Matter. By the start of CFA, Luna was already possessed, simply covering his possession under a masquerade of politeness. Spectra was also possessed by Dark Matter, and became Luna's "master" via unknown means. Dark Matter is never directly fought unless the Observatarians' fight against Dark Spectra is counted.