Spideroo is a regular enemy in Kirby Mass Attack. It drops down from above the screen tries to grab one of the Kirbys before slowly retreating back up. If the rest do not pull it down to the ground in time, it slams its victim down on the ground forcefully, which KOs the Kirby and turns him into an angel instantly, bypassing the blue, hurt state. While it usually hangs down from a fixed position, Spideroo will appear whenever Kirby tries to pull a web cocoon off a spider web, and these can move horizontally while being suspended by its thread.
Appearance
It is very similar in appearance to Como as both are spiders with three eyes, but has a blue or sometimes green color scheme instead of orange-brown. They have a banded body and (oddly) six legs, and a large pair of mandibles. If they appear from off-screen, there is always a rustle of green leaves before they appear. Otherwise, they are seen clearly hanging by a spider thread at the top of the screen.