Sweeper is a non-damaging psych. Pressing an empty space will create a black hole that attracts most small to medium-sized enemies for a short duration. The black hole will release its grip if Neku doesn't follow through with another attack. Since Sweeper does not deal damage, at first glance the only difference is in boot and reboot times. In reality though, different Sweeper pins last for different lengths of time, a fact not indicated in the pins' stats or description. All Sweeper psychs are Reaper class.
Pigs are immune to Sweeper.
Sweeper is deadly when used properly. Its best purpose is to set up a huge puck hit on multiple enemies from a fast, high-efficiency psych. There is usually only time to use Sweeper once per battle, so make it count!
Octo Squeeze is first obtained on W2D3. It forms an excellent combo with Piercing Pillar S (Ice Blow/Ice Risers) or Lance Lunge (Ichimonji), and to a lesser degree, Vulcan Uppercut. It will be useful in most non-boss battles for the rest of the maingame.
Sweeper doesn't work very well with Burst Rounds or Entanglement, as those psychs have very small hitboxes and may not hit all the enemies in the black hole. Rhyme is unable to hit any enemies in the black hole.
Me Time is Free Time is the postgame version of Sweeper. In the postgame, Sweeper can be very useful alongside Time Bomb psyches by planting several bombs right and using the Sweeper pin right before the first starts to detonate, drawing nearby enemies into a series of powerful explosions. The postgame also holds access to Nexus Ray, which can be used alongside Sweeper to ensure you hit something. However, the only Nexus Ray pins that aren't Reaper class are Big Bang and Big Crunch, which limits your other options as Sweeper and Nexus Ray eat up three pin slots instead of just two.
|118||Octo Squeeze||R||Sweeper||1||5||7.5||Press empty space to form a black hole that draws enemies toward it. (Some enemies may not be affected.)|
|119||Snail Squeeze||R||Sweeper||1||5||8||Press empty space to form a black hole that draws enemies toward it. (Some enemies may not be affected.)|
|120||Vacu Squeeze||R||Sweeper||1||5||6||Press empty space to form a black hole that draws enemies toward it. (Some enemies may not be affected.)|
|275||Me Time is Free Time||Unbranded||R||Sweeper||1||0||4||"I'm not antisocial. I'm introspective," muses this pin's Reaper designer. Press empty space to activate the pin's psych.|