Burst of Shenma

The Burst of Shenma is a move from Pikmin 360 and Pikmin RPG. It is the power of the deity, Shenma.

Pikmin 360
In Pikmin 360, it is gained, along with the Sword of Shenma, at the end of the game. In the game it isn't explained how it is gained, but in the comic book adaption, it is given down as a gift from Shenma himself within the sword, also explaining why it can not be used without the sword. It is extremely powerful and can wipe out a group of 5-10 grey pikmin in one hit.

Pikmin RPG
Apparently the sword has worn down with use, and along with that, the burst. According to the website, it would take about 3 hits to take out a group of 5 grey pikmin.