Those Guys (例のヤツ rei no yatsu) is an enemy that appears in the Main Chapters and Stories of Legend mode.
They are a small crowd (3) of stick figures, and are a relatively common and weak enemy. They have high health but low attack damage, kind of like a twisted counterpart of Tank Cat. They have a semi quick attack speed.
They are hard for newer players most of the time. To defeat them quickly, use Axe Cat. In later stages they are used mainly as meatshields for stronger enemies like Master A. They like to pour out in the dozens or hundreds to annoy the player and get hit instead by single-target dealers such as Gross Cat.
A bunch of wusses who like to gang up. Found each other on the internet. Surprisingly, all of them are quite rich.