ни́кой • (níkoj)
The accusative, dative and prepositional forms are used only when ни́кой is on its own (not in front of a noun) and refers to a person. The dative form is dated and is replaced by на (na) + the prepositional form (На ни́кого да благодаря). In informal Bulgarian the nominative form is often used instead of the accusative and prepositional ones (Ни́кой питаш, с ни́кой разговарям). This usage is not considered standard.