- "Dangerous Ball Tower" redirects here. For the version of this boss fought in Sonic Mania's Mirage Saloon Zone, see Dangerous Ball Tower (Sonic Mania boss).
Bead Worm, known as Dangerous Ball Tower (デンジャラス・ボールタワー) in the Japanese manual, is the second boss of Sonic Chaos, fought at the end of Gigalopolis Zone.
The Bead Worm rises up in the beginning, sways back and forth, launches its segments at the player, and then replaces them to begin the cycle anew. The first and third segments are thrown diagonally into the air, bouncing off the ground, while the second segment is launched horizontally on the ground. Luckily, the head’s top is weak, and so the player can destroy the boss by jumping at it and landing squarely on the top of its head. It'll throw its bottom-most body segment in the air, so they must stay on the ground when attacking.
This boss reappears in Knuckles' Act 1 of Sonic Mania's Mirage Saloon Zone, as an exclusive mini-boss for the echidna.
Artwork from the Japanese manual