To my disappointment, North Korean state media stated that Kim Jong Un did not use his family's mastery of magic to teleport or time travel out of the public eye.
"In fact, people can't disappear and reappear by folding space," stated a report in the Rodong Shinmun, the newspaper of the Central Committee of the Workers' Party of Korea. From Mysterious Universe:
Chukjibop, literally a "method of shrinking the earth," is described as the ability to quickly move towards the blind spot of an enemy at a speed so fast that the attacker seems to temporarily disappear. The mythical version of a concept in East Asian martial arts has been attributed to several figures in Chinese and Japanese mythology, and more recently depicted in Japanese animation, or through the use of special effects in Chinese Kung Fu movies.
According to myth, [Kim Jong Un's grandfather] Kim Il Sung was able to use the chukjibop technique to win a battle against imperial Japanese soldiers during the time when Korea was a colony of Japan (1910-1945), when he was purportedly leading Korean guerillas in exile[…]
[Last week's] report marked the first time that state media flatly denied that a Kim family myth was true, South Korea's Unification Ministry said.
"We need to pay attention to the current leader's denial of the mythification of his predecessors, including his criticism of them in October, at Mt. Kumgang," a ministry official told reporters.