Ratchet fires the Defragmenter.

The Defragmenter is a shotgun weapon in Ratchet & Clank: Going Mobile. It can be bought after completing the Data Mainframe leve for 18,000 Bolt Icon (Invert), which is a hefty price in the game, but not unaffordable. It fires three blue beams in a cone arrangement across the screen, similarly to other shotguns, What makes the Defragmenter different, however, is that the beams can pass through objects, including enemies, crates, and even walls, making it a very effective weapon on groups of enemies, or even stacks of crates. To balance this out, the Defragmenter is initially not all that powerful, and has a slow rate of fire.

Like all other shotguns, its power is less prominent at longer ranges, but due to the ability to fire through walls, it can be used as a way for Ratchet to fire behind improvised cover.