Runt Ball Rasengan

The user creates a miniature-sized Rasengan through limited supplies of chakra. The full effect of the technique is unknown as Naruto collapsed before using it.

Trivia

 * This technique was first introduced in one of the episodes of Rock Lee no Seishun Full-Power Ninden.
 * This is the first Rock Lee no Seishun Full-Power Ninden jutsu to be taken out of and be shown in Naruto.
 * In the manga, Konohamaru used a miniature-sized Rasengan that looks very much like this one.