Police, eager to apprehend Kora, revealed in April there were 14 warrants for his arrest for various charges including breach of release conditions, driving offences and possession of a knife in a public place.
The teen was labelled "dangerous" and police warned people not to approach him.
He was eventually tracked down and has been in custody since his arrest.
Judge Anna Johns gave the offender a first-strike warning for the offence, which has a maximum penalty of 14 years imprisonment.
Kora will be sentenced in October.
Synthetic cannabis was pulled from shelves in May after urgent legislation was pushed through forcing manufacturers to prove their products were "low risk" before they could be sold.