Zoni

The Zoni are characters from the Ratchet & Clank series.

Biography
A mysterious race of ethereal aliens that are capable of travel through time and space and can choose to let others see and/or hear them. They are neither biological nor mechanical, but are instead beings of pure energy that manifest on the physical plane of exictance by inhabiting metal bodies. They occasionally appear, usually only visible to Clank when he is alone or asleep, to aid Ratchet and Clank on their quest. In the ending cutscene of Tools of Destruction, they make themselves visible to everyone and kidnap Clank leaving the game on a cliffhanger. In Quest for Booty, they regard Nefarious as a doctor and believe he will be able to repair Clank. In A Crack in Time, Zoni can be found and collected to upgrade Ratchet's ship.

Connection to PlayStation All-Stars
One of the Zoni's appears as a DLC Minion that can be purchased for $0.49. However you can also buy him in a small pack of $1.99 or along with all the other minions for the price of $4.99.