Dark Kinto Un
From Dragon Ball Wiki, the ''Dragon Ball'' encyclopedia
The Dark Kinto Un (ダーク 筋斗雲, Dāku Kintōun; FUNimation "Dark Nimbus") is a magical cloud that appeared in Dragon Ball as an alternate version of the more widely known Kinto Un. Unlike the Kinto Un, the Dark Kinto Un can carry people of an impure nature. Much like the Kinto Un, its primary function is a mode of transportation for one or more people. Presumably, it can also be used to carry cargo if the need arises. It looks exactly like the Kinto Un, but instead of gold it is dark purple in color. Karin can also change the Dark Kinto Un from a solid to pure gas in order to make its cargo or passenger(s) fall straight through, much like someone of impure nature attempting to ride the Kinto Un.
[edit] Overview
In a filler portion of Dragon Ball, the Dark Kinto Un was lent to Tao after he had climbed the Karin Tower and drank Karin's Sacred Water (which was actually just ordinary water). This was done to ensure that Tao would gain no further strength on his way down as the true enhancement to one's self from Karin's Tower comes from the climb of, training within, and descent of the tower. Half-way down, Karin let the cloud drop Tao, thus causing the mercenary to crash into the ground at high velocity. This is the only appearance of the cloud in the series. It is unknown whether or not there is a huge cloud containing multiple Dark Kinto Un like there was with the Kinto Un.
The Dark Kinto Un is never used or mentioned in the manga.
[edit] In video games
Kuririn also uses this item during the flying stages of his Story mode in Dragon Ball: Advanced Adventure (due to the fact Krillin is "impure"). As Kuririn's Story mode has no actual storyline or cut-scenes, it is never explained how he obtained the cloud. In the English releases of the game, it is called the Black Nimbus.
In Dragon Ball: Raging Blast, the Dark Nimbus appears competing with the Flying Nimbus in a pre-fight mini-game to see who gets the most Capsules.