Though it is possible to pick and throw a Party Ball in the Super Smash Bros. games, this is currently something not possible to do in SSF2 as of version 1.1 Beta. Similarly to Melee, in order to open a Party Ball, it has to be attacked enough until it floats up in the air, makes a funny jingle and opens up, releasing the items inside. There may be times the Party Ball does not release any items at all or may release damaging explosions.
The Party Ball has no concrete origin game. Kusudama is a term broadly used in Japan to refer to two different but closely related concepts. The first use refers to decorative balls, usually made of paper but may also be made out of metal, which are frequently used in festivals, celebrations, graduations, etc.. They are normally hanged so they stay in a high spot. The ball is comprised of two semi-spheres tied together with a string in the middle, which assures its content may remain inside; these balls are typically filled with confetti, balloons, welcoming messages and even prizes. In order to open a ball, a volunteer has to pull the string so it snaps, releasing the semi-spheres and dropping down the content inside. All this concept is reinterpreted with the Party Ball in SSB and SSF2 in a similar way, except there is no need to pull a string to open it. The second use refers to a form of origami created by sewing multiple identical pyramidal units together through their points to form a spherical shape; the decorative balls bare a strong resemblance to these origami shapes and, indeed, are named after them. Japanese people tend to differentiate both Kusudama apart by using the kanji (薬玉) for the origami technique and the kana (くす玉) for the decorative balls.